Composition and light emitting device using the same

ABSTRACT

A composition is provided containing a phosphorescent compound and a polymer compound having a constitutional unit represented by the formula (Y): 
       Ar Y1   (Y)
 
     wherein Ar Y1  represents an arylene group, a divalent heterocyclic group or the like; and at least one constitutional unit selected from the constitutional units represented by the formulas (Ia) to (Id): 
     
       
         
         
             
             
         
       
     
     wherein m represents an integer of 0 to 4, n represents an integer of 0 to 3, R T1  represents an alkyl group, an alkoxy group, an aryl group, a monovalent heterocyclic group or the like, R x  represents a hydrogen atom, an alkyl group, an alkoxy group, an aryl group, a monovalent heterocyclic group or the like, Ar represents an aromatic hydrocarbon group or a heterocyclic group, nA and nB represent an integer of 0 to 3, and L A  and L B  represent an alkylene group, a cycloalkylene group, an arylene group or a divalent heterocyclic group.

TECHNICAL FIELD

The present invention relates to a composition and a light emittingdevice using the same.

BACKGROUND ART

Light emitting devices such as an organic electroluminescent device(organic EL device) can be suitably used for applications such asdisplays and the like because of properties such as high light emissionefficiency and low voltage driving, and are recently attractingattention. This light emitting device has organic layers such as a lightemitting layer and a charge transporting layer. Polymer compounds usedfor production of a light emitting device are investigated because byuse of a polymer compound, an organic layer can be formed by applicationmethods typified by an inkjet printing method.

As the material used in a light emitting layer of a light emittingdevice, fox example, a composition comprising a polymer compoundcomprising a fluorene constitutional unit and a constitutional unithaving a triazine structure and a phosphorescent compound is proposed(Patent document 1). This polymer compound is a polymer compound notcomprising constitutional units represented by the formulae (Ia) to (Id)described below.

PRIOR ART DOCUMENT Patent Document

Patent document 1: JP-A No. 2012-036388

SUMMARY OF THE INVENTION Problems to be Solved by the Invention

A light emitting device produced by using the above-describedcomposition, however, did not have necessarily sufficient luminancelife.

Then, the present invention has an object of providing a composition anda polymer compound which are useful for production of a light emittingdevice excellent in luminance life. Further, the present invention hasan object of providing a light emitting device produced by using thecomposition or the polymer compound.

Means for Solving the Problems

In a first aspect, the present invention provides a compositioncomprising

a polymer compound comprising a constitutional unit represented by thefollowing formula (Y) and at least one constitutional unit selected fromthe group consisting of a constitutional unit represented by thefollowing formula (Ia), a constitutional unit represented by thefollowing formula (Ib), a constitutional unit represented by thefollowing formula (Ic) and a constitutional unit represented by thefollowing formula (Id), and

a phosphorescent compound:

Ar^(Y1)  (Y)

[wherein, Ar^(Y1) represents an arylene group, a divalent heterocyclicgroup or a divalent group in which at least one arylene group and atleast one divalent heterocyclic group are bonded directly to each other,and these groups each optionally have a substituent.]

[wherein,

m represents an integer of 0 to 4. The plurality of m may be the same ordifferent.

n represents an integer of 0 to 3. The plurality of n may be the same ordifferent.

R^(T1) represents an alkyl group, a cycloalkyl group, an alkoxy group, acycloalkoxy group, an aryl group or a monovalent heterocyclic group, andthese groups each optionally have a substituent. When a plurality ofR^(T1) are present, they may be the same or different.

R^(x) represents a hydrogen atom, an alkyl group, a cycloalkyl group, analkoxy group, a cycloalkoxy group, an aryl group or a monovalentheterocyclic group, and these groups each optionally have a substituent.The plurality of R^(X) may be the same or different and may be combinedtogether to form a ring together with the carbon atoms to which they areattached.

Ar represents an aromatic hydrocarbon group or a heterocyclic group, andthese groups each optionally have a substituent.

nA represents an integer of 0 to 3.

L^(A) represents an alkylene group, a cycloalkylene group, an arylenegroup or a divalent heterocyclic group, and these groups each optionallyhave a substituent. When a plurality of L^(A) are present, they may bethe same or different.

nB represents an integer of 0 to 3.

L^(B) represents an alkylene group, a cycloalkylene group, an arylenegroup or a divalent heterocyclic group, and these groups each optionallyhave a substituent. When a plurality of L^(A) are present, they may bethe same or different.].

In a second aspect, the present invention provides a polymer compoundcomprising

a constitutional unit represented by the above-described formula (Y),

at least one constitutional unit selected from the group consisting of aconstitutional unit represented by the above-described formula (Ia), aconstitutional unit represented by the above-described formula (Ib), aconstitutional unit represented by the above-described formula (Ic) anda constitutional unit represented by the above-described formula (Id),and

a phosphorescent constitutional unit having a group obtained by removingone or more hydrogen atoms bonding directly to carbon atoms or heteroatoms constituting a phosphorescent compound represented by thefollowing formula (1):

[wherein,

M represents a ruthenium atom, a rhodium atom, a palladium atom, aniridium atom or a platinum atom.

n¹ represents an integer of 1 or more, n² represents an integer of 0 ormore, and n¹+n² is 2 or 3. n¹+n² is 3 when M is a ruthenium atom, arhodium atom or an iridium atom, while n¹+n² is 2 when M is a palladiumatom or a platinum atom.

E¹ and E² each independently represent a carbon atom or a nitrogen atom.At least one of E¹ and E² is a carbon atom.

The ring R¹ represents a 5-membered or 6-membered aromatic heterocyclicring, and these rings each optionally have a substituent. When aplurality of the substituents are present, they may be the same ordifferent and may be combined together to form a ring together with theatoms to which they are attached. When a plurality of the rings R¹ arepresent, they may be the same or different. E¹ is a carbon atom when thering R¹ is a 6-membered aromatic heterocyclic ring.

The ring R² represents a 5-membered or 6-membered aromatic hydrocarbonring or a 5-membered or 6-membered aromatic heterocyclic ring, and theserings each optionally have a substituent. When a plurality of thesubstituents are present, they may be the same or different and may becombined together to form a zing together with the atoms to which theyare attached. When a plurality of the rings R² are present, they may bethe same or different. E² is a carbon atom when the ring R² is a6-membered aromatic heterocyclic ring.

A¹-G¹-A² represents an anionic bidentate ligand, A¹ and A² eachindependently represent a carbon atom, an oxygen atom or a nitrogenatom, and these atoms may be an atom constituting the ring. G¹represents a single bond or an atomic group constituting the bidentateligand together with A¹ and A². When a plurality of A¹-G¹-A² arepresent, they may be the same or different.].

In a third aspect, the present invention provides a light emittingdevice produced by using the above-described composition or theabove-described polymer compound.

Effect of the Invention

The present invention can provide a composition and a polymer compoundwhich are useful for production of a light emitting device excellent inluminance life. Further, the present invention can provide a lightemitting device produced by using the composition or the polymercompound.

MODES FOR CARRYING OUT THE INVENTION

Suitable embodiments of the present invention will be illustrated indetail below.

Explanation of Common Term

Terms commonly used in the present specification have the followingmeanings unless otherwise stated.

Me represents a methyl group, Et represents an ethyl group, Burepresents a butyl group, i-Pr represents an isopropyl group, and t-Burepresents a tert-butyl group.

A hydrogen atom may be a heavy hydrogen atom or a light hydrogen atom.

A solid line representing a bond to a central metal in a formularepresenting a metal complex denotes a covalent bond or a coordinatebond.

“Polymer compound” denotes a polymer having molecular weightdistribution and having a polystyrene-equivalent number averagemolecular weight of 1×10³ to 1×10⁸.

A polymer compound may be any of a block copolymer, a random copolymer,an alternating copolymer and a graft copolymer, and may also be anotherembodiment.

An end group of a polymer compound is preferably a stable group becauseif a polymerization active group remains intact at the end, when thepolymer compound is used for fabrication of a light emitting device, thelight emitting property or luminance life possibly becomes lower. Thisend group is preferably a group having a conjugated bond to the mainchain, and includes, for example, groups bonding to an aryl group or amonovalent heterocyclic group via a carbon-carbon bond.

“Low molecular weight compound” denotes a compound having no molecularweight distribution and having a molecular weight of 1×10⁴ or less.

“Constitutional unit” denotes a unit structure found once or more in apolymer compound.

“Alkyl group” may be any of linear or branched. The number of carbonatoms of the linear alkyl group is, not including the number of carbonatoms of a substituent, usually 1 to 50, preferably 3 to 30, morepreferably 4 to 20. The number of carbon atoms of the branched alkylgroups is, not including the number of carbon atoms of a substituent,usually 3 to 50, preferably 3 to 30, more preferably 4 to 20.

The alkyl group optionally has a substituent, and examples thereofinclude a methyl group, an ethyl group, a propyl group, an isopropylgroup, a butyl group, an isobutyl group, a tert-butyl group, a pentylgroup, an isoamyl group, a 2-ethylbutyl group, a hexyl group, a heptylgroup, an octyl group, a 2-ethylhexyl group, a 3-propylheptyl group, adecyl group, a 3,7-dimethyloctyl group, a 2-ethyloctyl group, a2-hexyldecyl group and a dodecyl group, and groups obtained bysubstituting a hydrogen atom in these groups with a cycloalkyl group, analkoxy group, a cycloalkoxy group, an aryl group, a fluorine atom or thelike, and the alkyl group having a substituent includes atrifluoromethyl group, a pentafluoroethyl group, a perfluorobutyl group,a perfluorohexyl group, a perfluorooctyl group, a 3-phenylpropyl group,a 3-(4-methylphenyl)propyl group, a 3-(3,5-di-n-hexylphenyl) propylgroup and a 6-ethyloxyhexyl group.

The number of carbon atoms of “Cycloalkyl group” is, not including thenumber of carbon atoms of a substituent, usually 3 to 50, preferably 3to 30, more preferably 4 to 20.

The cycloalkyl group optionally has a substituent, and examples thereofinclude a cyclohexyl group, a cyclohexylmethyl group and acyclohexylethyl group.

“Aryl group” denotes an atomic group remaining after removing from anaromatic hydrocarbon one hydrogen atom linked directly to a carbon atomconstituting the ring. The number of carbon atoms of the aryl group is,not including the number of carbon atoms of a substituent, usually 6 to60, preferably 6 to 20, more preferably 6 to 10.

The aryl group optionally has a substituent, and examples thereofinclude a phenyl group, a 1-naphthyl group, a 2-naphthyl group, a1-anthracenyl group, a 2-anthracenyl group, a 9-anthracenyl group, a1-pyrenyl group, a 2-pyrenyl group, a 4-pyrenyl group, a 2-fluorenylgroup, a 3-fluorenyl group, a 4-fluorenyl group, a 2-phenylphenyl group,a 3-phenylphenyl group, a 4-phenylphenyl group, and groups obtained bysubstituting a hydrogen atom in these groups with an alkyl group, acycloalkyl group, an alkoxy group, a cycloalkoxy group, an aryl group, afluorine atom or the like.

“Alkoxy group” may be any of linear or branched. The number of carbonatoms of the linear alkoxy group is, not including the number of carbonatoms of a substituent, usually 1 to 40, preferably 4 to 10. The numberof carbon atoms of the branched alkoxy group is, not including thenumber of carbon atoms of a substituent, usually 3 to 40, preferably 4to 10.

The alkoxy group optionally has a substituent, and examples thereofinclude a methoxy group, an ethoxy group, a propyloxy group, anisopropyloxy group, a butyloxy group, an isobutyloxy group, atert-butyloxy group, a pentyloxy group, a hexyloxy group, a heptyloxygroup, an octyloxy group, a 2-ethylhexyloxy group, a nonyloxy group, adecyloxy group, a 3,7-dimethyloctyloxy group and a lauryloxy group, andgroups obtained by substituting a hydrogen atom in these groups with acycloalkyl group, an alkoxy group, a cycloalkoxy group, an aryl group, afluorine atom or the like.

The number of carbon atoms of “Cycloalkoxy group” is, not including thenumber of carbon atoms of a substituent, usually 3 to 40, preferably 4to 10.

The cycloalkoxy group optionally has a substituent, and examples thereofinclude a cyclohexyloxy group.

The number of carbon atoms of “Aryloxy group” is, not including thenumber of carbon atoms of a substituent, usually 6 to 60, preferably 7to 48.

The aryloxy group optionally has a substituent, and examples thereofinclude a phenoxy group, a 1-naphthyloxy group, a 2-naphthyloxy group, a1-anthracenyloxy group, a 9-anthracenyloxy group, a 1-pyrenyloxy group,and groups obtained by substituting a hydrogen atom in these groups withan alkyl group, a cycloalkyl group, an alkoxy group, a cycloalkoxygroup, a fluorine atom or the like.

“p-Valent heterocyclic group” (p represents an integer of 1 or more)denotes an atomic group remaining after removing from a heterocycliccompound p hydrogen atoms among hydrogen atoms directly linked to acarbon atom or a hetero atom constituting the ring. Of p-valentheterocyclic groups, “p-valent aromatic heterocyclic groups” as anatomic group remaining after removing from an aromatic heterocycliccompound p hydrogen atoms among hydrogen atoms directly linked to acarbon atom or a hetero atom constituting the ring are preferable.

“Aromatic heterocyclic compound” denotes a compound in which theheterocyclic ring itself shows aromaticity such as oxadiazole,thiadiazole, thiazole, oxazole, thiophene, pyrrole, phosphole, furan,pyridine, pyrazine, pyrimidine, triazine, pyridazine, quinoline,isoquinoline, carbazole and dibenzophosphole, and a compound in which anaromatic ring is condensed to the heterocyclic ring even if theheterocyclic ring itself shows no aromaticity such as phenoxazine,phenothiazine, dibenzoborole, dibenzosilole and benzopyran.

The number of carbon atoms of the monovalent heterocyclic group is, notincluding the number of carbon atoms of a substituent, usually 2 to 60,preferably 4 to 20.

The monovalent heterocyclic group optionally has a substituent, andexamples thereof include a thienyl group, a pyrrolyl group, a furylgroup, a pyridyl group, a piperidyl group, a quinolyl group, anisoquinolyl group, a pyrimidinyl group, a triazinyl group, and groupsobtained by substituting a hydrogen atom in these groups with an alkylgroup, a cycloalkyl group, an alkoxy group, a cycloalkoxy group or thelike.

“Halogen atom” denotes a fluorine atom, a chlorine atom, a bromine atomor an iodine atom.

“Amino group” optionally has a substituent, and a substituted aminogroup is preferable. The substituent which an amino group has ispreferably an alkyl group, a cycloalkyl group, an aryl group or amonovalent heterocyclic group.

The substituted amino group includes, for example, a dialkylamino group,a dicycloalkylamino group and a diarylamino group.

The amino group includes, for example, a dimethylamino group, adiethylamino group, a diphenylamino group, a bis(4-methylphenyl)aminogroup, a bis(4-tert-butylphenyl)amino group and abis(3,5-di-tert-butylphenyl)amino group.

“Alkenyl group” may be any of linear or branched. The number of carbonatoms of the linear alkenyl group, not including the number of carbonatoms of the substituent, is usually 2 to 30, preferably 3 to 20. Thenumber of carbon atoms of the branched alkenyl group, not including thenumber of carbon atoms of the substituent, is usually 3 to 30,preferably 4 to 20.

The number of carbon atoms of “Cycloalkenyl group”, not including thenumber of carbon atoms of the substituent, is usually 3 to 30,preferably 4 to 20.

The alkenyl group and cycloalkenyl group each optionally have asubstituent, and examples thereof include a vinyl group, a 1-propenylgroup, a 2-propenyl group, a 2-butenyl group, a 3-butenyl group, a3-pentenyl group, a 4-pentenyl group, a 1-hexenyl group, a 5-hexenylgroup, a 7-octenyl group, and these groups having a substituent.

“Alkynyl group” may be any of linear or branched. The number of carbonatoms of the alkynyl group, not including the number of carbon atoms ofthe substituent, is usually 2 to 20, preferably 3 to 20. The number ofcarbon atoms of the branched alkynyl group, not including the number ofcarbon atoms of the substituent, is usually 4 to 30, preferably 4 to 20.

The number of carbon atoms of “Cycloalkynyl group”, not including thenumber of carbon atoms of the substituent, is usually 4 to 30,preferably 4 to 20.

The alkynyl group and cycloalkynyl group each optionally have asubstituent, and examples thereof include an ethynyl group, a 1-propynylgroup, a 2-propynyl group, a 2-butynyl group, a 3-butynyl group, a3-pentynyl group, a 4-pentynyl group, a 1-hexenyl group, a 5-hexenylgroup, and these groups having a substituent.

“Arylene group” denotes an atomic group remaining after removing from anaromatic hydrocarbon two hydrogen atoms linked directly to carbon atomsconstituting the ring. The number of carbon atoms of the arylene groupis, not including the number of carbon atoms of a substituent, usually 6to 60, preferably 6 to 30, more preferably 6 to 18.

The arylene group optionally has a substituent, and examples thereofinclude a phenylene group, a naphthalenediyl group, an anthracenediylgroup, a phenanthrenediyl group, a dihydrophenanthrenediyl group, anaphthacenediyl group, a fluorenediyl group, a pyrenediyl group, aperylenediyl group, a chrysenediyl group, and these groups having asubstituent, preferably, groups represented by the formulae (A-1) to(A-20). The arylene group includes groups obtained by linking aplurality of these groups.

[wherein, R and R^(a) each independently represent a hydrogen atom, analkyl group, a cycloalkyl group, an aryl group or a monovalentheterocyclic group. The plurality of R and R^(a) each may be the same ordifferent, and groups R^(a) may be combined together to form a ringtogether with the atoms to which they are attached.]

The number of carbon atoms of the divalent heterocyclic group is, notincluding the number of carbon atoms of a substituent, usually 2 to 60,preferably 3 to 20, more preferably 4 to 15.

The divalent heterocyclic group optionally has a substituent, andexamples thereof include divalent groups obtained by removing frompyridine, diazabenzene, triazine, azanaphthalene, diazanaphthalene,carbazole, dibenzofuran, dibenzothiophene, dibenzosilole, phenoxazine,phenothiazine, acridine, dihydroacridine, furan, thiophene, azole,diazole and triazole two hydrogen atoms among hydrogen atoms linkingdirectly to a carbon atom or a hetero atom constituting the ring,preferably groups represented by the formulae (AA-1) to (AA-34). Thedivalent heterocyclic group includes groups obtained by linking aplurality of these groups.

[wherein, R and R^(a) represent the same meaning as described above.]

“Crosslinkable group” is a group capable of forming a new bond by beingsubjected to a heating treatment, an ultraviolet irradiation treatment,a radical reaction and the like, and is preferably a group representedby any one of the formulae (B-1) to (B-17). These groups each optionallyhave a substituent.

“Substituent” represents a halogen atom, a cyano group, an alkyl group,a cycloalkyl group, an aryl group, a monovalent heterocyclic group, analkoxy group, a cycloalkoxy group, an aryloxy group, an amino group, asubstituted amino group, an alkenyl group, a cycloalkenyl group, analkynyl group or a cycloalkynyl group. The substituent may be acrosslinkable group.

“Dendron” is a group having a regular dendritic branched structurehaving a branching point at an atom or ring (In other word, a dendrimerstructure). A compound having a dendron (hereinafter, referred to as“dendrimer”.) includes, for example, structures described inInternational Publication WO 02/067343, JP-A No. 2003-231692,International Publication WO 2003/079736, and International PublicationWO 2006/097717.

The dendron is preferably a group represented by the formula (D-A) or(D-B).

[wherein,

m^(DA1), m^(DA2) and m^(DA3) each independently represent an integer of0 or more.

G^(DA) represents a nitrogen atom, an aromatic hydrocarbon group or aheterocyclic group, and these groups each optionally have a substituent.

Ar^(DA1), Ar^(DA2) and Ar^(DA3) each independently represent an arylenegroup or a divalent heterocyclic group, and these groups each optionallyhave a substituent. When a plurality of Ar^(DA1), Ar^(DA2) and Ar^(DA3)are present, they may be the same or different at each occurrence.

T^(DA) represents an aryl group or a monovalent heterocyclic group, andthese groups each optionally have a substituent. The plurality of T^(DA)may be the same or different.]

[wherein,

m^(DA1), m^(DA2), m^(DA3), m^(DA4), m^(DA5), m^(DA6) and m^(DA7) eachindependently represent an integer of 0 or more.

G^(DA) represents a nitrogen atom, an aromatic hydrocarbon group or aheterocyclic group, and these groups each optionally have a substituent.The plurality of G^(DA) may be the same or different.

Ar^(DA1), Ar^(DA2), Ar^(DA3), Ar^(DA4), Ar^(DA5), Ar^(DA6) and Ar^(DA7)each independently represent an arylene group or a divalent heterocyclicgroup, and these groups each optionally have a substituent. When aplurality of Ar^(DA1), Ar^(DA2), Ar^(DA3), Ar^(DA4), Ar^(DA5), Ar^(DA6)and Ar^(DA7) are present, they may be the same or different at eachoccurrence.

T^(DA) represents an aryl group or a monovalent heterocyclic group, andthese groups each optionally have a substituent. The plurality of T^(DA)may be the same or different.]

m^(DA1), m^(DA2), m^(DA3), m^(DA4), m^(DA5), m^(DA6) and m^(DA7) areusually an integer of 10 or less, preferably an integer of 5 or less,more preferably 0 or 1. It is preferable that m^(DA1), m^(DA2), m^(DA3),m^(DA4), m^(DA5), m^(DA6) and m^(DA7) are the same integer.

G^(DA) is preferably a group represented by the formula (GDA-11) to(GDA-15), and these groups each optionally have a substituent.

[wherein,

* represents a linkage to Ar^(DA1) in the formula (D-A), Ar^(DA1) in theformula (D-B), Ar^(DA2) in the formula (D-B) or Ar^(DA3) in the formula(D-B).

** represents a linkage to Ar^(DA2) in the formula (D-A), Ar^(DA2) inthe formula (D-B), Ar^(DA4) in the formula (D-B) or Ar^(DA6) in theformula (D-B).

*** represents a linkage to Ar^(DA3) in the formula (D-A), Ar^(DA3) inthe formula (D-B), Ar^(DA5) in the formula (D-B) or Ar^(DA7) in theformula (D-B).

R^(DA) represents a hydrogen atom, an alkyl group, a cycloalkyl group,an alkoxy group, a cycloalkoxy group, an aryl group or a monovalentheterocyclic group, and these groups each optionally have a substituent.When a plurality of R^(DA) are present, they may be the same ordifferent.]

R^(DA) is preferably a hydrogen atom, an alkyl group, a cycloalkylgroup, an alkoxy group or a cycloalkoxy group, more preferably ahydrogen atom, an alkyl group or cycloalkyl group, and these groups eachoptionally have a substituent.

It is preferable that Ar^(DA1), Ar^(DA2), Ar^(DA3), Ar^(DA4), Ar^(DA5),Ar^(DA6) and Ar^(DA7) are groups represented by the formulae (ArDA-1) to(ArDA-3).

[wherein,

R^(DA) represents the same meaning as described above.

R^(DB) represents a hydrogen atom, an alkyl group, a cycloalkyl group,an aryl group or a monovalent heterocyclic group, and these groups eachoptionally have a substituent. When a plurality of R^(DB) are present,they may be the same or different at each occurrence.]

R^(DB) is preferably an alkyl group, a cycloalkyl group, an aryl groupor a monovalent heterocyclic group, more preferably an aryl group or amonovalent heterocyclic group, further preferably an aryl group.

T^(DA) is preferably groups represented by the formulae (TDA-1) to(TDA-3).

[wherein, R^(DA) and R^(DB) represent the same meaning described above.]

The group represented by the formula (D-A) is preferably a grouprepresented by the formula (D-A1) to (D-A3).

[wherein,

R^(p1), R^(p2) and R^(p3) each independently represent an alkyl group, acycloalkyl group, an alkoxy group, a cycloalkoxy group or a halogenatom. When a plurality of R^(p1) and R^(p2) are present, they may be thesame or different at each occurrence.

np1 represents an integer of 0 to 5, np2 represents an integer of 0 to3, and np3 represents 0 or 1. The plurality of np1 may be the same ordifferent.]

The group represented by the formula (D-B) is preferably a grouprepresented by the formula (D-B1) to (D-B3).

[wherein,

R^(p1), R^(p2) and R^(p3) each independently represent an alkyl group, acycloalkyl group, an alkoxy group, a cycloalkoxy group or a halogenatom. When a plurality of R^(p1) and R^(p2) are present, they may be thesame or different at each occurrence.

np1 represents an integer of 0 to 5, np2 represents an integer of 0 to3, and np3 represents 0 or 1. When a plurality of np1 and np2 arepresent, they may be the same or different at each occurrence.]

np1 is preferably 0 or 1, more preferably 1. np2 is preferably 0 or 1,more preferably 0. np3 is preferably 0.

R^(p1), R^(p2) and R^(p3) are preferably an alkyl group or a cycloalkylgroup.

<Polymer Compound>

The polymer compound contained in the composition of the presentinvention will be illustrated.

The polymer compound contained in the composition of the presentinvention is a polymer compound comprising a constitutional unitrepresented by the formula (Y), and at least one constitutional unitselected from the group consisting of a constitutional unit representedby the formula (Ia), a constitutional unit represented by the formula(Ib), a constitutional unit represented by the formula (Ic) and aconstitutional unit represented by the formula (Id) (hereinafter,referred to also as “the first polymer compound”.).

[Constitutional unit represented by the formula (Y)]

Ar^(Y1)  (Y)

The arylene group represented by Ar^(Y1) is more preferably a grouprepresented by the formula (A-1), the formula (A-2), the formula (A-6)to (A-10), the formula (A-19) or the formula (A-20), further preferablya group represented by the formula (A-1), the formula (A-2), the formula(A-7), the formula (A-9) or the formula (A-19), and these groups eachoptionally have a substituent.

The divalent heterocyclic group represented by Ar^(Y1) is morepreferably a group represented by the formula (AA-1) to (AA-4), theformula (AA-10) to (AA-15), the formula (AA-18) to (AA-21), the formula(AA-33) or the formula (AA-34), further preferably a group representedby the formula (AA-4), the formula (AA-10), the formula (AA-12), theformula (AA-14) or the formula (AA-33), and these groups each optionallyhave a substituent.

The more preferable range and the further preferable range of thearylene group and the divalent heterocyclic group in the divalent groupin which at least one arylene group and at least one divalentheterocyclic group are bonded directly to each other represented byAr^(Y1) are the same as the more preferable range and the furtherpreferable range of the arylene group and the divalent heterocyclicgroup represented by Ar^(Y1) described above, respectively.

“The divalent group in which at least one arylene group and at least onedivalent heterocyclic group are bonded directly to each other” includes,for example, groups represented by the following formulae, and each ofthem optionally has a substituent.

[wherein, R^(XX) represents a hydrogen atom, an alkyl group, acycloalkyl group, an aryl group or a monovalent heterocyclic group andthese groups each optionally have a substituent.]

R^(XX) is preferably an alkyl group, a cycloalkyl group or an arylgroup, and these groups each optionally have a substituent.

The substituent which the group represented by Ar^(Y1) optionally has ispreferably an alkyl group, a cycloalkyl group or an aryl group, andthese groups each optionally further have a substituent.

The constitutional unit represented by the formula (Y) includes, forexample, constitutional units represented by the formulae (Y-1) to(Y-10), and from the standpoint of light emission efficiency of a lightemitting device produced by using the composition of the presentinvention preferable are constitutional units represented by theformulae (Y-1) to (Y-3), from the standpoint of electrontransportability of a light emitting device produced by using thecomposition of the present invention preferable are constitutional unitsrepresented by the formulae (Y-4) to (Y-7), and from the standpoint ofhole transportability of a light emitting device produced by using thecomposition of the present invention preferable are constitutional unitsrepresented by the formulae (Y-8) to (Y-10), and from the standpoint ofluminance life of a light emitting device produced by using thecomposition of the present invention preferable are constitutional unitsrepresented by the formulae (Y-1) to (Y-4).

[wherein, R^(Y1) represents a hydrogen atom, an alkyl group, acycloalkyl group, an alkoxy group, a cycloalkoxy group, an aryl group ora monovalent heterocyclic group, and these groups each optionally have asubstituent. The plurality of R^(Y1) may be the same or different, andadjacent groups R^(Y1) may be combined together to form a ring togetherwith the carbon atoms to which they are attached.]

R^(Y1) is preferably a hydrogen atom, an alkyl group, a cycloalkyl groupor an aryl group, and these groups each optionally have a substituent.

The constitutional unit represented by the formula (Y-1) is preferably aconstitutional unit represented by the formula (Y-1′).

[wherein, R^(Y11) represents an alkyl group, a cycloalkyl group, analkoxy group, a cycloalkoxy group, an aryl group or a monovalentheterocyclic group, and these groups each optionally have a substituent.The plurality of R^(Y11) may be the same or different.]

R^(Y11) is preferably an alkyl group, a cycloalkyl group or an arylgroup, more preferably an alkyl group or a cycloalkyl group, and thesegroups each optionally have a substituent.

[wherein,

R^(Y1) represents the same meaning as described above.

X^(Y1) represents a group represented by —C(R^(Y2))₂—,—C(R^(Y2))═C(R^(Y2))— or —C(R^(Y2))₂—C(R^(Y2))₂—. R^(Y2) represents ahydrogen atom, an alkyl group, a cycloalkyl group, an alkoxy group, acycloalkoxy group, an aryl group or a monovalent heterocyclic group, andthese groups each optionally have a substituent. The plurality of R^(Y2)may be the same or different, and groups R^(Y2) may be combined togetherto form a ring together with the carbon atoms to which they areattached.]

R^(Y2) is preferably an alkyl group, a cycloalkyl group, an aryl groupor a monovalent heterocyclic group, more preferably an alkyl group acycloalkyl group or an aryl group, and these groups each optionally havea substituent.

Regarding the combination of two R^(Y2)s in the group represented by—C(R^(Y2))₂— in X^(Y1), it is preferable that the both are an alkylgroup or a cycloalkyl group, the both are an aryl group, the both are amonovalent heterocyclic group, or one is an alkyl group or a cycloalkylgroup and the other is an aryl group or a monovalent heterocyclic group,it is more preferable that one is an alkyl group or cycloalkyl group andthe other is an aryl group, and these groups each optionally have asubstituent. The two groups R^(Y2) may be combined together to form aring together with the atoms to which they are attached, and when thegroups R^(Y2) form a ring, the group represented by —C(R^(Y2))₂— ispreferably a group represented by the formula (Y-A1) to (Y-A5), morepreferably a group represented by the formula (Y-A4), and these groupseach optionally have a substituent.

Regarding the combination of two R^(Y2)s in the group represented by—C(R^(Y2))═C(R^(Y2))— in X^(Y1), it is preferable that the both are analkyl group or cycloalkyl group, or one is an alkyl group or acycloalkyl group and the other is an aryl group, and these groups eachoptionally have a substituent.

Four R^(Y2)s in the group represented by —C(R^(Y2))₂—C(R^(Y2))₂— inX^(Y1) are preferably an alkyl group or a cycloalkyl group eachoptionally having a substituent. The plurality of R^(Y2) may be combinedtogether to form a ring together with the atoms to which they areattached, and when the groups R^(Y2) form a ring, the group representedby —C(R^(Y2))₂—C(R^(Y2))₂— is preferably a group represented by theformula (Y-B1) to (Y-B5), more preferably a group represented by theformula (Y-B3), and these groups each optionally have a substituent.

[wherein, R^(Y2) represents the same meaning as described above.]

It is preferable that the constitutional unit represented by the formula(Y-2) is a constitutional unit represented by the formula (Y-2′).

[wherein, R^(Y1) and X^(Y1) represent the same meaning as describedabove.]

[wherein, R^(Y1) and X^(Y1) represent the same meaning as describedabove.]

It is preferable that the constitutional unit represented by the formula(Y-3) is a constitutional unit represented by the formula (Y-3′).

[wherein, R^(Y11) and X^(Y1) represent the same meaning as describedabove.]

[wherein,

R^(Y1) represents the same meaning as described above.

R^(Y3) represents a hydrogen atom, an alkyl group, a cycloalkyl group,an alkoxy group, a cycloalkoxy group, an aryl group or a monovalentheterocyclic group, and these groups each optionally have asubstituent.]

R^(Y3) is preferably an alkyl group, a cycloalkyl group, an alkoxygroup, a cycloalkoxy group, an aryl group or a monovalent heterocyclicgroup, more preferably an aryl group, and these groups each optionallyhave a substituent.

It is preferable that the constitutional unit represented by the formula(Y-4) is a constitutional unit represented by the formula (Y-4′), and itis preferable that the constitutional unit represented by the formula(Y-6) is a constitutional unit represented by the formula (Y-6′).

[wherein, R^(Y1) and R^(Y3) represent the same meaning as describedabove.]

[wherein,

R^(Y1) represents the same meaning as described above.

R^(Y4) represents a hydrogen atom, an alkyl group, a cycloalkyl group,an alkoxy group, a cycloalkoxy group, an aryl group or a monovalentheterocyclic group, and these groups each optionally have asubstituent.]

R^(Y4) is preferably an alkyl group, a cycloalkyl group, an alkoxygroup, a cycloalkoxy group, an aryl group or a monovalent heterocyclicgroup, more preferably an aryl group, and these groups each optionallyhave a substituent.

The constitutional unit represented by the formula (Y) includes, forexample, a constitutional unit composed of an arylene group representedby the formula (Y-101) to (Y-121), a constitutional unit composed of adivalent heterocyclic group represented by the formula (Y-201) to(Y-206), and a constitutional unit composed of a divalent group in whichat least one arylene group and at least one divalent heterocyclic groupare bonded directly to each other represented by the formula (Y-301) to(Y-304).

The amount of the constitutional unit represented by the formula (Y) inwhich Ar^(Y1) is an arylene group is preferably 0.5 to 90 mol %, morepreferably 30 to 80 mol % with respect to the total amount ofconstitutional units contained in the first polymer compound, becauselight emission efficiency of a light emitting device produced by usingthe composition of the present invention is excellent.

The amount of the constitutional unit represented by the formula (Y) inwhich Ar^(Y1) is a divalent heterocyclic group or a divalent group inwhich at least one arylene group and at least one divalent heterocyclicgroup are bonded directly to each other is preferably 0.5 to 50 mol %,more preferably 3 to 30 mol % with respect to the total amount ofconstitutional units contained in the first polymer compound, becausecharge transportability of a light emitting device produced by using thecomposition of the present invention is excellent.

The constitutional unit represented by the formula (Y) may be containedonly singly or two or more units thereof may be contained in the firstpolymer compound.

[Constitutional Unit Represented by the Formula (X)]

It is preferable that the first polymer compound further comprises aconstitutional unit represented by the following formula (X), becausehole transportability of a light emitting device produced by using thecomposition of the present invention is excellent.

[wherein,

a^(X1) and a^(X2) each independently represent an integer of 0 or more.

Ar^(X1) and Ar^(X3) each independently represent an arylene group or adivalent heterocyclic group, and these groups each optionally have asubstituent.

Ar^(X2) and Ar^(X4) each independently represent an arylene group, adivalent heterocyclic group or a divalent group in which at least onearylene group and at least one divalent heterocyclic group are bondeddirectly to each other, and these groups each optionally have asubstituent.

R^(X1), R^(X2) and R^(X3) each independently represent a hydrogen atom,an alkyl group, a cycloalkyl group, an aryl group or a monovalentheterocyclic group, and these groups each optionally have asubstituent.]

a^(X1) is preferably 2 or less, more preferably 1, because lightemission efficiency of a light emitting device produced by using thecomposition of the present invention is excellent.

a^(X2) is preferably 2 or less, more preferably 0, because lightemission efficiency of a light emitting device produced by using thecomposition of the present invention is excellent.

R^(X1), R^(X2) and R^(X3) are preferably an alkyl group, a cycloalkylgroup, an aryl group or a monovalent heterocyclic group, more preferablyan aryl group, and these groups each optionally have a substituent.

The arylene group represented by Ar^(X1) and Ar^(X3) is more preferablya group represented by the formula (A-1) or the formula (A-9), furtherpreferably a group represented by the formula (A-1), and these groupseach optionally have a substituent.

The divalent heterocyclic group represented by Ar^(X1) and Ar^(X3) ismore preferably a group represented by the formula (AA-1), the formula(AA-2) or the formula (AA-7) to (AA-26), and these groups eachoptionally have a substituent.

Ar^(X1) and Ar^(X3) are preferably an arylene group optionally having asubstituent.

The arylene group represented by Ar^(X2) and Ar^(X4) is more preferablya group represented by the formula (A-1), the formula (A-6), the formula(A-7), the formula (A-9) to (A-11) or the formula (A-19), and thesegroups each optionally have a substituent.

The more preferable range of the divalent heterocyclic group representedby Ar^(X2) and Ar^(X4) is the same as the more preferable range of thedivalent heterocyclic group represented by Ar^(X1) and Ar^(X3).

The more preferable range and the further preferable range of thearylene group and the divalent heterocyclic group in the divalent groupin which at least one arylene group and at least one divalentheterocyclic group are bonded directly to each other represented byAr^(X2) and Ar^(X4) are the same as the more preferable range and thefurther preferable range of the arylene group and the divalentheterocyclic group represented by Ar^(X1) and Ar^(X3), respectively.

The divalent group in which at least one arylene group and at least onedivalent heterocyclic group are bonded directly to each otherrepresented by Ar^(X2) and Ar^(X4) includes the same groups as thedivalent group in which at least one arylene group and at least onedivalent heterocyclic group are bonded directly to each otherrepresented by Ar^(X1) in the formula (Y).

Ar^(X2) and Ar^(X4) are preferably an arylene group optionally having asubstituent.

The substituent which the group represented by Ar^(X1) to Ar^(X4) andR^(X1) to R^(X3) optionally has is preferably an alkyl group, acycloalkyl group or an aryl group, and these groups each optionallyfurther have a substituent.

The constitutional unit represented by the formula (X) is preferably aconstitutional unit represented by the formula (X-1) to (X-7), morepreferably a constitutional unit represented by the formula (X-1) to(X-6), further preferably a constitutional unit represented by theformula (X-3) to (X-6).

(wherein, R^(X4) and R^(X5) each independently represent a hydrogenatom, an alkyl group, a cycloalkyl group, an alkoxy group, a cycloalkoxygroup, an aryl group, an aryloxy group, a halogen atom, a monovalentheterocyclic group or a cyano group, and these groups each optionallyhave a substituent. The plurality of R^(X4) may be the same ordifferent. The plurality of R^(X5) may be the same or different, andadjacent groups R^(X5) may be combined together to form a ring togetherwith the carbon atoms to which they are attached.]

The amount of the constitutional unit represented by the formula (X) ispreferably 0.1 to 50 mol %, more preferably 1 to 40 mol %, furtherpreferably 5 to 30 mol % with respect to the total amount ofconstitutional units contained in the first polymer compound, becausehole transportability of a light emitting device produced by using thecomposition of the present invention is excellent.

The constitutional unit represented by the formula (X) includes, forexample, constitutional units represented by the formulae (X1-1) to(X1-1), preferably constitutional units represented by the formulae(X1-3) to (X1-10).

The constitutional unit represented by the formula (X) may be containedonly singly or two or more units thereof may be contained in the firstpolymer compound.

[Constitutional Units Represented by the Formula (Ia) to the Formula(Id)]

m is preferably an integer of 0 to 2, more preferably 0, because a lightemitting device produced by using the composition of the presentinvention is excellent in electron transportability.

n is preferably an integer of 0 to 2, more preferably 0, because a lightemitting device produced by using the composition of the presentinvention is excellent in electron transportability.

R^(T1) is preferably an alkyl group or a cycloalkyl group, morepreferably an alkyl group, because a light emitting device produced byusing the composition of the present invention is excellent in electrontransportability.

R^(x) is preferably a hydrogen atom, an alkyl group, a cycloalkyl groupor an aryl group, more preferably a hydrogen atom or an aryl group,because a light emitting device produced by using the composition of thepresent invention is excellent in electron transportability.

Ar is preferably an aromatic hydrocarbon group, because a light emittingdevice produced by using the composition of the present invention isexcellent in light emission efficiency.

The number of carbon atoms of the aromatic hydrocarbon group representedby Ar, not including the number of carbon atoms of a substituent, isusually 6 to 60, preferably 6 to 30, more preferably 6 to 18.

The arylene group portion obtained by removing a group represented bythe formula (Ia′) from the aromatic hydrocarbon group represented by Aris preferably a group represented by the formula (A-1) to the formula(A-20), more preferably a group represented by the formula (A-1), theformula (A-2), the formula (A-6) to the formula (A-10), the formula(A-19) or the formula (A-20), further preferably a group represented bythe formula (A-1), the formula (A-2), the formula (A-7), the formula(A-9) or the formula (A-19).

[wherein, m, R^(T1), R^(x), nA and L^(A) represent the same meaning asdescribed above. * represents a site binding to Ar.]

The number of carbon atoms of the heterocyclic group represented by Ar,not including the number of carbon atoms of a substituent, is usually 6to 60, preferably 6 to 30, more preferably 6 to 18.

The divalent heterocyclic group portion obtained by removing a grouprepresented by the formula (Ia′) from the heterocyclic group representedby Ar is preferably a group represented by the formula (AA-1) to theformula (AA-34).

nA is preferably 1 or 2, more preferably 1, because a light emittingdevice produced by using the composition of the present invention isexcellent in electron transportability.

L^(A) is preferably an arylene group or a divalent heterocyclic group,more preferably an arylene group, because a light emitting deviceproduced by using the composition of the present invention is excellentin electron transportability.

nB is preferably 1 or 2, more preferably 1, because a light emittingdevice produced by using the composition of the present invention isexcellent in electron transportability.

L^(B) is preferably an arylene group or a divalent heterocyclic group,more preferably an arylene group, because a light emitting deviceproduced by using the composition of the present invention is excellentin electron transportability.

The first polymer compound is a polymer compound comprising at least oneconstitutional unit selected from the group consisting of aconstitutional unit represented by the formula (Ia), a constitutionalunit represented by the formula (Ib), a constitutional unit representedby the formula (Ic) and a constitutional unit represented by the formula(Id), and is preferably a polymer compound comprising a constitutionalunit represented by the formula (Ia) or a constitutional unitrepresented by the formula (Ib), more preferably a polymer compoundcomprising a constitutional unit represented by the formula (Ia),because a light emitting device produced by using the composition of thepresent invention is excellent in electron transportability.

When the first polymer compound is a polymer compound comprising aconstitutional unit represented by the formula (Ic), the constitutionalunit represented by the formula (Ic) is an end constitutional unit. Whenthe first polymer compound is a polymer compound comprising aconstitutional unit represented by the formula (Id), the constitutionalunit represented by the formula (Id) is an end constitutional unit.

“End constitutional unit” denotes a constitutional unit at an end of apolymer compound, and the end constitutional unit is preferably aconstitutional unit derived from an end-capping agent in production of apolymer compound.

The constitutional unit represented by the formula (Ia) is preferably aconstitutional unit represented by the formula (Ie), because a lightemitting device produced by using the composition of the presentinvention is excellent in electron transportability.

[wherein, Ar and R^(x) represent the same meaning as described above.]

The constitutional unit represented by the formula (Ie) includes, forexample, constitutional units represented by the formulae (Ie-1) to(Ie-5), preferably constitutional units represented by the formula(Ie-1) or (Ie-2).

The constitutional unit represented by the formula (Ib) is preferably aconstitutional unit represented by the formula (If), because a lightemitting device produced by using the composition of the presentinvention is excellent in electron transportability.

The constitutional unit represented by the formula (If) includes, forexample, constitutional units represented by the formulae (If-1) to(If-8), preferably constitutional units represented by the formula(If-1), (If-2), (If-4) or (If-6).

The constitutional unit represented by the formula (Ic) includes, forexample, constitutional units represented by the formulae (Ic-1) to(Ic-6).

The constitutional unit represented by the formula (Id) preferablyincludes, for example, constitutional units represented by the followingformulae (Id-1) to (Id-6).

The amount of the constitutional unit represented by the formula (Ia),the constitutional unit represented by the formula (Ib), theconstitutional unit represented by the formula (Ic) and theconstitutional unit represented by the formula (Id) is preferably 0.1 to10 mol %, more preferably 0.1 to 5 mol %, further preferably 0.1 to 3mol %, with respect to the total amount of constitutional unitscontained in the first polymer compound, because a light emitting deviceproduced by using the composition of the present invention is excellentin electron transportability.

The constitutional unit represented by the formula (Ia), theconstitutional unit represented by the formula (Ib), the constitutionalunit represented by the formula (Ic) and the constitutional unitrepresented by the formula (Id) each may be contained singly or two ormore of each of the constitutional units may be contained in the firstpolymer compound.

The first polymer compound has a polystyrene-equivalent weight-averagemolecular weight of preferably 1×10⁴ to 5×10⁵ and apolystyrene-equivalent number-average molecular weight of preferably2×10³ to 4×10⁵.

The first polymer compound includes, for example, polymer compounds(P-1) to (P-7) shown in Table 1.

TABLE 1 constitutional unit and mole fraction thereof formula (Y)formula formu- formu- formu- (X) lae lae lae formulae formulae (Y-1) to(Y-4) to (Y-8) to (X-1) to (Ia) to polymer (Y-3) (Y-7) (Y-10) (X-7) (Id)others compound p q r s t u (P-1) 0.1 to 0.1 to 0 0 0.1 to 0 to 30 99.899.8 10.0 (P-2) 0.1 to 0 0.1 to 0 0.1 to 0 to 30 99.8 99.8 10.0 (P-3)0.1 to 0 0 0.1 to 0.1 to 0 to 30 99.8 99.8 10.0 (P-4) 0.1 to 0.1 to 0.1to 0 0.1 to 0 to 30 99.7 99.7 99.7 10.0 (P-5) 0.1 to 0.1 to 0 0.1 to 0.1to 0 to 30 99.7 99.7 99.7 10.0 (P-6) 0.1 to 0 0.1 to 0.1 to 0.1 to 0 to30 99.7 99.7 99.7 10.0 (P-7) 0.1 to 0.1 to 0.1 to 0.1 to 0.1 to 0 to 3099.6 99.6 99.6 99.6 10.0[in the table, p, q, r, s, t and u represent the mole fraction of eachconstitutional unit. p+q+r+s+t+u=100 and 100≧p+q+r+s+t≧70. The otherconstitutional unit denotes a constitutional unit other than theconstitutional unit represented by the formula (Y), the constitutionalunit represented by the formula (X) and the constitutional unitsrepresented by the formula (Ia) to the formula (Id).]

<Phosphorescent Compound>

The phosphorescent compound contained the composition of the presentinvention will be illustrated.

The phosphorescent compound contained the composition of the presentinvention is preferably a phosphorescent compound represented by theformula (1).

The phosphorescent compound represented by the formula (1) isconstituted of M as a central metal, a ligand of which number isprescribed by a subscript n¹ and a ligand of which number is prescribedby a subscript n².

M is preferably an iridium atom or a platinum atom, more preferably aniridium atom, because the light emitting device of the present inventionis more excellent in light emission efficiency.

n¹ is preferably 2 or 3, more preferably 3 when M is a ruthenium atom, arhodium atom or an iridium atom.

n¹ is preferably 2 when M is a palladium atom or a platinum atom.

It is preferable that E¹ and E² are a carbon atom.

The ring R¹ is preferably a pyridine ring, a pyrimidine ring, animidazole ring or a triazole ring, and these rings each optionally havea substituent.

The ring R¹ is preferably a benzene ring, a naphthalene ring, a fluorenering, a phenanthrene ring, a pyridine ring, a diazabenzene ring or atriazine ring, more preferably a benzene ring, a pyridine ring or apyrimidine ring, and these rings each optionally have a substituent.

The substituent which the ring R¹ and the ring R² optionally haveincludes an alkyl group, a cycloalkyl group, an alkoxy group, acycloalkoxy group, an aryl group, an aryloxy group, a monovalentheterocyclic group, a halogen atom and a substituted amino group,preferably an alkyl group, a cycloalkyl group, an aryl group, amonovalent heterocyclic group or a substituted amino group, morepreferably an alkyl group, an aryl group, a monovalent heterocyclicgroup or a substituted amino group.

It is preferable that the at least one ring selected from the groupconsisting of the ring R¹ and the ring R² has a group represented by theformula (2), and it is more preferable that the ring R² has a grouprepresented by the formula (2), because a light emitting device producedby using the composition of the present invention is more excellent inluminance life.

—R¹⁰⁰  (2)

[wherein, R¹⁰⁰ represents an aryl group, a monovalent heterocyclic groupor a substituted amino group, and these groups each optionally have asubstituent.]

When a plurality of the rings R¹ and the rings R² are present, it ispreferable that all of the plurality of the rings R¹, all of theplurality of the rings R² or all of the plurality of the rings R¹ andthe rings R² have a group represented by the formula (2), and it is morepreferable that all of the plurality of the rings R² have a grouprepresented by the formula (2).

R¹⁰⁰ is preferably an aryl group or a monovalent heterocyclic group,more preferably an aryl group.

The aryl group, the monovalent heterocyclic group or the substitutedamino group represented by R¹⁰⁰ is preferably a dendron.

The anionic bidentate ligand represented by A¹-G¹-A² includes, forexample, ligands represented by the following formulae.

(wherein, * represents a site binding to M.]

The phosphorescent compound represented by the formula (1) is preferablya phosphorescent compound represented by the formula (1-A) or aphosphorescent compound represented by the formula (1-B), because alight emitting device produced by using the composition of the presentinvention is excellent in light emission efficiency.

[wherein,

M, n¹, n², E¹ and A¹-G-A² represent the same meaning as described above.

E^(11A), E^(12A), E^(13A), E^(21A), E^(22A), E^(23A) and E^(24A) eachindependently represent a nitrogen atom or a carbon atom. When aplurality of E^(11A), E^(12A), E^(13A), E^(21A), E^(22A), E^(23A) andE^(24A) are present, they may be the same or different at eachoccurrence. R^(11A), R^(12A), R^(13A) may be either present or notpresent when E^(11A), E^(12A) and E^(13A) are a nitrogen atom. R^(21A),R^(22A), R^(23A) and R^(24A) are not present when E^(21A), E^(22A),E^(23A) and E^(24A) are a nitrogen atom.

R^(11A), R^(12A), R^(13A), R^(21A), R^(22A), R^(23A) and R^(24A) eachindependently represent a hydrogen atom, an alkyl group, a cycloalkylgroup, an alkoxy group, a cycloalkoxy group, an aryl group, an aryloxygroup, a monovalent heterocyclic group, a halogen atom or a substitutedamino group, and these groups each optionally have a substituent. When aplurality of R^(11A), R^(12A), R^(13A), R^(21A), R^(22A), R^(23A) andR^(24A) are present, they may be the same or different at eachoccurrence. R^(11A) and R^(12A), R^(12A) and R^(13A), R^(11A) andR^(21A), R^(21A) and R^(22A), R^(22A) and R^(23A), and R^(23A) andR^(24A) each may be combined together to form a ring together with theatoms to which they are attached.

The ring R^(1A) represents an imidazole ring or a triazole ringconstituted of a nitrogen atom, E¹, E^(11A), E^(12A) and E^(13A).

The ring R^(2A) represents a benzene ring, a pyridine ring or apyrimidine ring constituted of two carbon atoms, E^(21A), E^(22A),E^(23A) and E^(24A).]

It is preferable that at least one selected from the group consisting ofR^(11A), R^(12A), R^(13A), R^(21A), R^(22A), R^(23A) and R^(24A) is agroup represented by the formula (2), because a light emitting deviceproduced by using the composition of the present invention is moreexcellent in luminance life.

When the ring R^(1A) is an imidazole ring, an imidazole ring in whichE^(11A) is a nitrogen atom or an imidazole ring in which E^(12A) is anitrogen atom is preferable, an imidazole ring in which E^(11A) is anitrogen atom is more preferable.

When the ring R^(1A) is a triazole ring, a triazole ring in whichE^(11A) and E^(12A) are a nitrogen atom or a triazole ring in whichE^(11A) and E^(13A) are a nitrogen atom is preferable, a triazole ringin which E^(11A) and E^(12A) are a nitrogen atom is more preferable.

When E^(11A) is a nitrogen atom and R^(11A) is present, it is preferablethat R^(11A) is an alkyl group, a cycloalkyl group or a grouprepresented by the formula (2).

When E^(11A) is a carbon atom, R^(11A) is preferably a hydrogen atom, analkyl group, a cycloalkyl group, an aryl group or a monovalentheterocyclic group, more preferably a hydrogen atom, an alkyl group, acycloalkyl group or an aryl group, further preferably a hydrogen atom,an alkyl group or a cycloalkyl group.

When E^(12A) is a nitrogen atom and R^(12A) is present, it is preferablethat R^(12A) is an alkyl group, a cycloalkyl group or a grouprepresented by the formula (2).

When E^(12A) is a carbon atom, R^(12A) is preferably a hydrogen atom, analkyl group, a cycloalkyl group, an aryl group or a monovalentheterocyclic group, more preferably a hydrogen atom, an alkyl group, acycloalkyl group or an aryl group, further preferably a hydrogen atom,an alkyl group or a cycloalkyl group.

When E^(13A) is a nitrogen atom and R^(13A) is present, it is preferablethat R^(13A) is an alkyl group, a cycloalkyl group or a grouprepresented by the formula (2).

When E^(13A) is a carbon atom, R^(13A) is preferably a hydrogen atom, analkyl group, a cycloalkyl group, an aryl group or a monovalentheterocyclic group, more preferably a hydrogen atom, an alkyl group, acycloalkyl group or an aryl group, further preferably a hydrogen atom,an alkyl group or a cycloalkyl group.

When the ring R^(1A) has a group represented by the formula (2), it ispreferable that R^(11A) or R^(12A) is a group represented by the formula(2), and it is more preferable that R^(11A) is a group represented bythe formula (2). The group represented by the formula (2) is preferablya dendron.

When the ring R^(2A) is a pyridine ring, a pyridine ring in whichE^(21A) is a nitrogen atom, a pyridine ring in which E^(22A) is anitrogen atom or a pyridine ring in which E^(23A) is a nitrogen atom ispreferable, a pyridine ring in which E^(22A) is a nitrogen atom is morepreferable.

When the ring R^(2A) is a pyrimidine ring, a pyrimidine ring in whichE^(21A) and E^(23A) are a nitrogen atom or a pyrimidine ring in whichE^(22A) and E^(24A) are a nitrogen atom is preferable, a pyrimidine ringin which E^(22A) and E^(24A) are a nitrogen atom is more preferable.

The ring R^(2A) is preferably a benzene ring.

R^(21A), R^(22A), R^(23A) and R^(24A) are preferably a hydrogen atom, analkyl group, a cycloalkyl group or a group represented by the formula(2), more preferably a hydrogen atom or a group represented by theformula (2).

When the ring R^(2A) has a group represented by the formula (2), it ispreferable that R^(22A) or R^(23A) is a group represented by the formula(2), it is more preferable that R^(22A) is a group represented by theformula (2). The group represented by the formula (2) is preferably adendron.

[wherein,

M, n¹, n² and A¹-G¹-A² represent the same meaning as described above.

E^(11B), E^(12B), E^(13B), E^(14B), E^(21B), E^(22B), E^(23B) andE^(24B) each independently represent a nitrogen atom or a carbon atom.When a plurality of E^(11B), E^(12B), E^(13B), E^(14B), E^(21B),E^(22B), E^(23B) and E^(24B) are present, they may be the same ordifferent at each occurrence. R^(11B), R^(12B), R^(13B), R^(14B),R^(21B), R^(22B), R^(23B) and R^(24B) are not present when E^(11B),E^(12B), E^(13B), E^(14B), E^(21B), E^(22B), E^(23B) and E^(24B) are anitrogen atom.

R^(11B), R^(12B), R^(13B), R^(14B), R^(21B), R^(22B), R^(23B) andR^(24B) each independently represent a hydrogen atom, an alkyl group, acycloalkyl group, an alkoxy group, a cycloalkoxy group, an aryl group,an aryloxy group, a monovalent heterocyclic group, a halogen atom or asubstituted amino group, and these groups each optionally have asubstituent. When a plurality of R^(11B), R^(12B), R^(13B), R^(14B),R^(21B), R^(22B), R^(23B) and R^(24B) are present, they may be the sameor different at each occurrence. R^(11B) and R^(12B), R^(12B) andR^(13B), R^(13B) and R^(14B), R^(11B) and R^(21B), R^(21B) and R^(22B),R^(22B) and R^(23B), and R^(23B) and R^(24B) each may be combinedtogether to form a ring together with the atoms to which they areattached.

The ring R^(1B) represents a pyridine ring or a pyrimidine ringconstituted of a nitrogen atom, a carbon atom, E^(11B), E^(12B), E^(13B)and E^(14B).

The ring R^(2B) represents a benzene ring, a pyridine ring or apyrimidine ring constituted of two carbon atoms, E^(21B), E^(22B),E^(23B) and E^(24B).]

It is preferable that at least one selected from the group consisting ofR^(11B), R^(12B), R^(13B), R^(14B), R^(21B), R^(22B), R^(23B) andR^(24B) is a group represented by the formula (2), because a lightemitting device produced by using the composition of the presentinvention is more excellent in luminance life.

When the ring R^(1B) is a pyrimidine ring, a pyrimidine ring in whichE^(11B) is a nitrogen atom or a pyrimidine ring in which E^(11B) is anitrogen atom is preferable, a pyrimidine ring in which E^(11B) is anitrogen atom is more preferable.

R^(11B), R^(12B), R^(13B) and R^(14B) are preferably a hydrogen atom, analkyl group, a cycloalkyl group or a group represented by the formula(2), more preferably a hydrogen atom or a group represented by theformula (2).

When the ring R^(1B) has a group represented by the formula (2), it ispreferable that R^(11B), R^(12B) or R^(13B) is a group represented bythe formula (2), it is more preferable that R^(11B) or R^(13B) is agroup represented by the formula (2), it is further preferable thatR^(11B) is a group represented by the formula (2). The group representedby the formula (2) is preferably a dendron.

When the ring R^(2B) is a pyridine ring, a pyridine ring in whichE^(21B) is a nitrogen atom, a pyridine ring in which E^(22B) is anitrogen atom or a pyridine ring in which E^(23B) is a nitrogen atom ispreferable, a pyridine ring in which E^(22B) is a nitrogen atom is morepreferable.

When the ring R^(2B) is a pyrimidine ring, a pyrimidine ring in whichE^(21B) and E^(23B) are a nitrogen atom or a pyrimidine ring in whichE^(22B) and E^(24B) are a nitrogen atom is preferable, a pyrimidine ringin which E^(22B) and E^(24B) are a nitrogen atom is more preferable.

The ring R^(2B) is preferably a benzene ring.

R^(21B), R^(22B), R^(23B) and R^(24B) are preferably a hydrogen atom, analkyl group, a cycloalkyl group or a group represented by the formula(2), more preferably a hydrogen atom or a group represented by theformula (2).

When the ring R^(2B) has a group represented by the formula (2), it ispreferable that R^(22B) or R^(23B) is a group represented by the formula(2), it is more preferable that R^(22B) is a group represented by theformula (2). The group represented by the formula (2) is preferably adendron.

The phosphorescent compound represented by the formula (1-A) ispreferably a phosphorescent compound represented by the formula (1-A1),a phosphorescent compound represented by the formula (1-A2), aphosphorescent compound represented by the formula (1-A3) or aphosphorescent compound represented by the formula (1-A4).

[wherein,

M, n¹, n², R^(11A), R^(12A), R^(13A), R^(21A), R^(22A), R^(23A), R^(24A)and A¹-G¹-A² represent the same meaning as described above.]

The phosphorescent compound represented by the formula (1-B) ispreferably a phosphorescent compound represented by the formula (1-B1),a phosphorescent compound represented by the formula (1-B2) or aphosphorescent compound represented by the formula (1-B3).

[wherein,

M, n¹, n², R^(11B), R^(12B), R^(13B), R^(14B), R^(21B), R^(22B), R^(23B)and R^(24B) and A¹-G¹-A² represent the same meaning as described above.

n³ and n⁴ each independently represent an integer of 1 or more, andn³+n⁴ is 2 or 3. n³+n⁴ is 3 when M is a ruthenium atom, a rhodium atomor an iridium atom, while n³+n⁴ is 2 when M is a palladium atom or aplatinum atom.

R^(15B), R^(16B), R^(17B) and R^(18B) each independently represent ahydrogen atom, an alkyl group, a cycloalkyl group, an alkoxy group, acycloalkoxy group, an aryl group, an aryloxy group, a monovalentheterocyclic group, a halogen atom or a substituted amino group, andthese groups each optionally have a substituent. When a plurality ofR^(15B), R^(16B), R^(17B) and R^(18B) are present, they may be the sameor different at each occurrence. R^(14B) and R^(15B), R^(15B) andR^(16B), R^(16B) and R^(17B), R^(17B) and R^(18B), and R^(18B) andR^(21B) each may be combined together to form a ring together with theatoms to which they are attached.]

The phosphorescent compound represented by the formula (1) includes, forexample, phosphorescent compounds represented by the following formulae.

The phosphorescent compound can be synthesized, for example, accordingto methods described in Japanese Patent Application National PublicationNo. 2004-530254, JP-A No. 2008-179617, JP-A No. 2011-105701, JapanesePatent Application National Publication No. 2007-504272, JP-A No.201.3-147449 and JP-A No. 2013-147450.

<Polymer Compound Comprising Phosphorescent Constitutional Unit>

The phosphorescent compound contained in the composition of the presentinvention may be a polymer compound (hereinafter, referred to also as“the second polymer compound”.) comprising a constitutional unit havingthe structure of a phosphorescent compound (namely, a constitutionalunit having a group obtained by removing 1 or more hydrogen atomsbonding directly to carbon atoms or hetero atoms constituting aphosphorescent compound. Hereinafter, referred to also as“phosphorescent constitutional unit”.).

The phosphorescent constitutional unit is preferably a constitutionalunit having the structure of a phosphorescent compound represented bythe formula (1), because a light emitting device produced by using thecomposition of the present invention is excellent in light emissionefficiency. The constitutional unit having the structure of aphosphorescent compound represented by the formula (1) is preferably aconstitutional unit having a group obtained by removing from aphosphorescent compound represented by the formula (1) 1 to 3 hydrogenatoms bonding directly to carbon atoms or hetero atoms constituting thecompound, more preferably a constitutional unit represented by theformula (1B), (2B), (3B) or (4B), further preferably a constitutionalunit represented by the formula (2B) or (3B), particularly preferably aconstitutional unit represented by the formula (2B).

[Phosphorescent Constitutional Unit Represented by the Formula (1B)]

[wherein,

M^(1B) represents a group obtained by removing from a phosphorescentcompound represented by the formula (1) one hydrogen atom bondingdirectly to a carbon atom or a hetero atom constituting the compound.

L^(C) represents an oxygen atom, a sulfur atom, —N(R^(A))—, —C(R^(B))₂—,—C(R^(B))═C(R^(B))—, —C≡C—, an arylene group or a divalent heterocyclicgroup, and these groups each optionally have a substituent. R^(A)represents a hydrogen atom, an alkyl group, a cycloalkyl group, an arylgroup or a monovalent heterocyclic group, and these groups eachoptionally have a substituent. R^(B) represents a hydrogen atom, analkyl group, a cycloalkyl group, an alkoxy group, a cycloalkoxy group,an aryl group or a monovalent heterocyclic group, and these groups eachoptionally have a substituent. The plurality of R^(B) may be the same ordifferent and may be combined together to form a ring together with thecarbon atoms to which they are attached. When a plurality of L^(C) arepresent, they may be the same or different.

n^(c1) represents an integer of 0 or more.]

R^(A) is preferably an aryl group or a monovalent heterocyclic group,more preferably an aryl group, and these groups each optionally have asubstituent.

R^(B) is preferably a hydrogen atom, an alkyl group, a cycloalkyl group,an aryl group or a monovalent heterocyclic group, more preferably ahydrogen atom, an alkyl group, a cycloalkyl group or an aryl group,further preferably a hydrogen atom or an alkyl group, particularlypreferably a hydrogen atom, and these groups each optionally have asubstituent.

L^(C) is preferably —C(R^(B))₂—, an arylene group or a divalentheterocyclic group, more preferably —C(R^(B))₂— or an arylene group,further preferably an arylene group, particularly preferably a grouprepresented by the formula (A-1) or (A-2), and these groups eachoptionally have a substituent.

The definition and examples of the substituent which R^(A), R^(B) andL^(C) optionally have are the same as the definition and examples of thesubstituent which the ring R¹ and the ring R² described above optionallyhave.

n^(c1) is usually an integer of 0 to 10, preferably an integer of 0 to5, more preferably an integer of 0 to 2, further preferably 0 or 1,particularly preferably 0.

When the second polymer compound is a polymer compound comprising aconstitutional unit represented by the formula (1B), the constitutionalunit represented by the formula (1B) is an end constitutional unit.

“End constitutional unit” denotes a constitutional unit at an end of apolymer compound, and the end constitutional unit is preferably aconstitutional unit derived from an end-capping agent in production of apolymer compound.

M^(1B) is more preferably a group represented by the formula (BM-1).

[wherein,

M, E¹, E², the ring R¹, the ring R² and A¹-G¹-A² represent the samemeaning as described above.

The ring R¹¹ represents a 5-membered or 6-membered aromatic heterocyclicring, and these rings each optionally have a substituent. When aplurality of the substituents are present, they may be the same ordifferent and may be combined together to form a ring together with theatoms to which they are attached. E¹ is a carbon atom when the ring R¹¹is a 6-membered aromatic heterocyclic ring.

The ring R¹² represents a 5-membered or 6-membered aromatic hydrocarbonring or a 5-membered or 6-membered aromatic heterocyclic ring, and theserings each optionally have a substituent. When a plurality of thesubstituents are present, they may be the same or different and may becombined together to form a ring together with the atoms to which theyare attached. E² is a carbon atom when the ring R¹² is a 6-memberedaromatic heterocyclic ring.

One of the ring R¹¹ and the ring R¹² has one connecting bond.

n¹¹ and n¹² each independently represent an integer of 0 or more.n¹¹+n¹² is 1 or 2. n¹¹+n¹² is 2 when M is a ruthenium atom, a rhodiumatom or an iridium atom, while n¹¹+n¹² is 1 when M is a palladium atomor a platinum atom.]

n¹¹ is more preferably 2 when M is a ruthenium atom, a rhodium atom oran iridium atom.

n¹¹ is preferably 1 when M is a palladium atom or a platinum atom.

When the ring R¹¹ has no connecting bond, the definition and examples ofthe ring R¹¹ are the same as the definition and examples of the ring R¹described above.

When the ring R¹¹ has a connecting bond, the definition and examples ofthe ring portion obtained by removing the connecting bond of the ringR¹¹ are the same as the definition and examples of the ring R¹ describedabove.

When the ring R¹² has no connecting bond, the definition and examples ofthe ring R¹² are the same as the definition and examples of the ring R²described above.

When the ring R¹² has a connecting bond, the definition and examples ofthe ring portion obtained by removing the connecting bond of the ringR¹² are the same as the definition and examples of the ring R² describedabove.

The definition and examples of the substituent which the ring R¹¹ andthe ring R¹² optionally have are the same as the definition and examplesof the substituent which the ring R¹ and the ring R² described aboveoptionally have.

[Constitutional Unit Represented by the Formula (28)]

[wherein,

M^(1B) represents the same meaning as described above.

L^(d) and L^(e) each independently represent an oxygen atom, a sulfuratom, —N(R^(A))—, —C(R^(B))₂—, —C(R^(B))═C(R^(B))—, —C≡C—, an arylenegroup or a divalent heterocyclic group, and these groups each optionallyhave a substituent. R^(A) and R^(B) represent the same meaning asdescribed above. When a plurality of L^(d) and L^(e) are present, theymay be the same or different at each occurrence.

n^(d1) and n^(e1) each independently represent an integer of 0 or more.The plurality of n^(d1) may be the same or different.

Ar^(1M) represents an aromatic hydrocarbon group or a heterocyclicgroup, and these groups each optionally have a substituent.]

L^(d) is preferably —C(R^(B))₂—, an azylene group or a divalentheterocyclic group, more preferably an arylene group or a divalentheterocyclic group, further preferably an arylene group, particularlypreferably a group represented by the formula (A-1) or (A-2), and thesegroups each optionally have a substituent.

L^(e) is preferably —C(R^(B))₂—, an arylene group or a divalentheterocyclic group, more preferably —C(R^(B))₂— or an arylene group,further preferably an arylene group, particularly preferably a grouprepresented by the formula (A-1) or (A-2), and these groups eachoptionally have a substituent.

n^(d1) and n^(e1) are usually an integer of 0 to 10, preferably aninteger of 0 to 5, more preferably an integer of 0 to 2, furtherpreferably 0 or 1, particularly preferably 0.

Ar^(1M) is preferably a group obtained by removing from a benzene ring,a naphthalene ring, a fluorene ring, a phenanthrene ring, adihydrophenanthrene ring, a pyridine ring, a diazabenzene ring, atriazine ring, a carbazole ring, a phenoxazine ring or a phenothiazinering three hydrogen atoms bonding directly to carbon atoms or heteroatoms constituting the ring, more preferably a group obtained byremoving from a benzene ring, a naphthalene ring, a fluorene ring, aphenanthrene ring or a dihydrophenanthrene ring three hydrogen atomsbonding directly to carbon atoms constituting the ring, furtherpreferably a group obtained by removing from a benzene ring or afluorene ring three hydrogen atoms bonding directly to carbon atomsconstituting the ring, particularly preferably a group obtained byremoving from a benzene ring three hydrogen atoms bonding directly tocarbon atoms constituting the ring, and these groups optionally have asubstituent.

The definition and examples of the substituent which L^(d), L^(e) andAr^(1M) optionally have are the same as the definition and examples ofthe substituent which the ring R¹ and the ring R² described aboveoptionally have.

[Constitutional Unit Represented by the Formula (3B)]

[wherein,

L^(d) and n^(d1) represent the same meaning as described above.

M^(2B) represents a group obtained by removing from a phosphorescentcompound represented by the formula (1) two hydrogen atoms bondingdirectly to carbon atoms or hetero atoms constituting the compound.]

M^(2B) is more preferably a group represented by the formula (BM-2) or(BM-3), further preferably a group represented by the formula (BM-2).

[wherein,

M, E¹, E², the ring R¹, the ring R², the ring R¹¹, the ring R¹² andA¹-G¹-A² represent the same meaning as described above. The plurality ofthe rings R¹¹ may be the same or different. The plurality of the ringsR¹² may be the same or different.

n¹³ and n¹⁴ each independently represent an integer of 0 or more.n¹³+n¹⁴ is 0 or 1. n¹³+n¹⁴ is 1 when M is a ruthenium atom, a rhodiumatom or an iridium atom, while n¹³+n¹⁴ is 0 when M is a palladium atomor a platinum atom.]

n¹³ is preferably 1 when M is a ruthenium atom, a rhodium atom or aniridium atom.

[wherein,

M, E¹, E², the ring R¹, the ring R², A¹-G¹-A², n¹¹ and n¹² represent thesame meaning as described above.

The ring R¹³ represents a 5-membered or 6-membered aromatic heterocyclicring, and these rings each optionally have a substituent. When aplurality of the substituents are present, they may be the same ordifferent and may be combined together to form a ring together with theatoms to which they are attached. E¹ is a carbon atom when the ring R¹³is a 6-membered aromatic heterocyclic ring.

The ring R¹⁴ represents a 5-membered or 6-membered aromatic hydrocarbonring or a 5-membered or 6-membered aromatic heterocyclic ring, and theserings each optionally have a substituent. When a plurality of thesubstituents are present, they may be the same or different and may becombined together to form a ring together with the atoms to which theyare attached. E² is a carbon atom when the ring R¹⁴ is a 6-memberedaromatic heterocyclic ring.

One of the ring R¹³ and the ring R¹⁴ has two connecting bonds, or eachof the ring R¹³ and the ring R¹⁴ has one connecting bond.]

When the ring R¹³ has no connecting bond, the definition and examples ofthe ring R¹³ are the same as the definition and examples of the ring R¹described above.

When the ring R¹³ has a connecting bond, the definition and examples ofthe ring portion obtained by removing the connecting bond of the ringR¹³ are the same as the definition and examples of the ring R¹ describedabove.

When the ring R¹⁴ has no connecting bond, the definition and examples ofthe ring R¹⁴ are the same as the definition and examples of the ring R²described above.

When the ring R¹⁴ has a connecting bond, the definition and examples ofthe ring portion obtained by removing the connecting bond of the ringR¹⁴ are the same as the definition and examples of the ring R² describedabove.

The definition and examples of the substituent which the ring R¹³ andthe ring R¹⁴ optionally have are the same as the definition and examplesof the substituent which the ring R¹ and the ring R² described aboveoptionally have.

It is preferable that each of the ring R¹³ and the ring R¹⁴ has oneconnecting bond.

[Constitutional Unit Represented by the Formula (4B)]

[wherein,

L^(d) and n^(d1) represent the same meaning as described above.

M^(3B) represents a group obtained by removing from a phosphorescentcompound represented by the formula (1) three hydrogen atoms bondingdirectly to carbon atoms or hetero atoms constituting the compound.]

M^(3B) is preferably a group represented by the formula (BM-4).

[wherein,

M, E¹, E², the ring R¹¹, the ring R¹², the ring R¹³, the ring R¹⁴ andA¹-G¹-A² represent the same meaning as described above.

n¹⁵ represents 0 or 1. n¹⁶ represents 1 or 3. n¹⁵ is 0 and n¹⁶ is 3 whenM is a ruthenium atom, a rhodium atom or an iridium atom. n¹⁵ is 1 andn¹⁶ is 1 when M is a palladium atom or a platinum atom.]

The phosphorescent constitutional unit includes, for example,constitutional units represented by the formulae (B-1) to (B-25).

[wherein,

D represents a group represented by the formula (2). When a plurality ofD are present, they may be the same or different.

R^(P) represents a hydrogen atom, an alkyl group, a cycloalkyl group, analkoxy group or a cycloalkoxy group, and these groups each optionallyhave a substituent.].

The amount of the phosphorescent constitutional unit is preferably 0.5to 50 mol %, more preferably 1 to 30 mol %, further preferably 3 to 15mol %, with respect to the total amount of constitutional unitscontained in the second polymer compound, because a light emittingdevice produced by using the composition of the present invention isexcellent in light emission efficiency.

The phosphorescent constitutional unit may be contained singly or two ormore of the constitutional units may be contained in the second polymercompound.

It is preferable that the second polymer compound further comprises aconstitutional unit represented by the formula (Y). The definition andexamples of the constitutional unit represented by the formula (Y) arethe same as the definition and examples of the constitutional unitrepresented by the formula (Y) contained in the first polymer compounddescribed above.

The amount of the constitutional unit represented by the formula (Y) inwhich Ar^(Y1) is an arylene group is preferably 0.5 to 90 mol %, morepreferably 30 to 80 mol %, with respect to the total amount ofconstitutional units contained in the second polymer compound, because alight emitting device produced by using the composition of the presentinvention is excellent in light emission efficiency.

The amount of the constitutional unit represented by the formula (Y) inwhich Ar^(Y1) is a divalent heterocyclic group or a divalent group inwhich at least one arylene group and at least one divalent heterocyclicgroup are bonded directly to each other is preferably 0.5 to 50 mol %,more preferably 3 to 30 mol %, with respect to the total amount ofconstitutional units contained in the second polymer compound, because alight emitting device produced by using the composition of the presentinvention is excellent in charge transportability.

The constitutional unit represented by the formula (Y) may be containedsingly or two or more of the constitutional units may be contained inthe second polymer compound.

It is preferable that the second polymer compound further comprises aconstitutional unit represented by the formula (X), because a lightemitting device produced by using the composition of the presentinvention is excellent in hole transportability. The definition andexamples of the constitutional unit represented by the formula (X) arethe same as the definition and examples of the constitutional unitrepresented by the formula (X) contained in the first polymer compounddescribed above.

The amount of the constitutional unit represented by the formula (X) ispreferably 0.1 to 50 mol %, more preferably 1 to 40 mol %, furtherpreferably 5 to 30 mol %, with respect to the total amount ofconstitutional units contained in the second polymer compound, because alight emitting device produced by using the composition of the presentinvention is excellent in hole transportability.

The constitutional unit represented by the formula (X) may be containedsingly or two or more of the constitutional units may be contained inthe second polymer compound.

The second polymer compound has a polystyrene-equivalent weight-averagemolecular weight of preferably 1×10⁴ to 5×10⁵ and apolystyrene-equivalent number-average molecular weight of preferably2×10³ to 4×10⁸.

The second polymer compound includes, for example, polymer compounds(P-8) to (P-14) shown in Table 2. “Other” constitutional unit denotes aconstitutional unit other than the constitutional unit represented bythe formula (Y) and the constitutional unit represented by the formula(X).

TABLE 2 constitutional unit and mole fraction thereof formulaphosphorescent formula (Y) (X) constitutional formulae formulae formulaeunit formulae (Y-4) to (Y-8) to (X-1) to formulae (1B) polymer (Y-1) to(Y-3) (Y-7) (Y-10) (X-7) to (4B) others compound p′ q′ r′ s′ t′ u′ (P-8)0.1 to 0.1 to 0 0 0.1 to 50.0 0 to 30 99.8 99.8 (P-9) 0.1 to 0 0.1 to 00.1 to 50.0 0 to 30 99.8 99.8 (P-10) 0.1 to 0 0 0.1 to 0.1 to 50.0 0 to30 99.8 99.8 (P-11) 0.1 to 0.1 to 0.1 to 0 0.1 to 50.0 0 to 30 99.7 99.799.7 (P-12) 0.1 to 0.1 to 0 0.1 to 0.1 to 50.0 0 to 30 99.7 99.7 99.7(P-13) 0.1 to 0 0.1 to 0.1 to 0.1 to 50.0 0 to 30 99.7 99.7 99.7 (P-14)0.1 to 0.1 to 0.1 to 0.1 to 0.1 to 50.0 0 to 30 99.6 99.6 99.6 99.6[in the table, p′, q′, r′, s′, t′ and u′ represent the mole fraction ofeach constitutional unit. p′+q′+r′+s′+t′+u′=100 and100≧p′+q′+r′+s′+t′≧70. The other constitutional unit denotes aconstitutional unit other than the constitutional unit represented bythe formula (Y), the constitutional unit represented by the formula (X)and the phosphorescent constitutional unit.]

<Composition>

The composition of the present invention will be illustrated.

The composition of the present invention is a composition comprising thefirst polymer compound and a phosphorescent compound (hereinafter,referred to also as “composition A”.).

In the composition A, the first polymer compound may be containedsingly, or two or more of the polymer compounds may be contained. In thecomposition A, the phosphorescent compound may be contained singly, ortwo or more of the phosphorescent compounds may be contained.

In the composition A, the content of the phosphorescent compound isusually 1 to 80 parts by weight when the sum of the first polymercompound and the phosphorescent compound is 100 parts by weight, and thecontent is preferably 3 to 60 parts by weight, more preferably 5 to 50parts by weight, further preferably 7 to 40 parts by weight, because alight emitting device produced by using the composition A is excellentin luminance life.

The composition A may further comprise a polymer compound comprising atleast one constitutional unit selected from the group consisting of aconstitutional unit represented by the formula (Y) and a constitutionalunit represented by the formula (X) (hereinafter, referred to also as“fourth polymer compound”.). The definition and examples of theconstitutional unit represented by the formula (Y) which may becontained in the fourth polymer compound are the same as the definitionand examples of the constitutional unit represented by the formula (Y)contained in the first polymer compound described above. The definitionand examples of the constitutional unit represented by (X) which may becontained in the fourth polymer compound are the same as the definitionand examples of the constitutional unit represented by the formula (X)which may be contained in the first polymer compound described above.The preferable range of the molecular weight of the fourth polymercompound is the same as that of the first polymer compound describedabove. In the composition A, the fourth polymer compound may becontained singly, or two or more of the polymer compounds may becontained.

When the composition A comprises the fourth polymer compound, the amountthereof is usually 1 to 80 parts by weight with respect to 100 parts byweight the first polymer compound.

The composition of the present invention may be a composition comprisingthe first polymer compound and the second polymer compound (hereinafter,referred to also as “composition B”.).

In the composition B, the first polymer compound may be containedsingly, or two or more of the polymer compounds may be contained. In thecomposition B, the second polymer compound may be contained singly, ortwo or more of the polymer compounds may be contained.

In the composition B, the content of the second polymer compound isusually 1 to 80 parts by weight when the sum of the first polymercompound and the second polymer compound is 100 parts by weight, and thecontent is preferably 3 to 60 parts by weight, more preferably 5 to 50parts by weight, because a light emitting device produced by using thecomposition B is excellent in luminance life.

<Polymer Compound of Other Embodiment>

A polymer compound comprising a constitutional unit represented by theformula (Y), at least one constitutional unit selected from the groupconsisting of a constitutional unit represented by the formula (Ia), aconstitutional unit represented by the formula (Ib), a constitutionalunit represented by the formula (Ic) and a constitutional unitrepresented by the formula (Id), and a phosphorescent constitutionalunit (hereinafter, referred to also as “third polymer compound”.)performs the same effect as that of the composition of the presentinvention.

The definition and examples of the constitutional unit represented bythe formula (Y) contained in the third polymer compound are the same asthe definition and examples of the constitutional unit represented bythe formula (Y) contained in the first polymer compound described above.

The amount of the constitutional unit represented by the formula (Y) inwhich Ar^(Y1) is an arylene group is preferably 0.5 to 90 mol %, morepreferably 30 to 80 mol %, with respect to the total amount ofconstitutional units contained in the third polymer compound, because alight emitting device produced by using the third polymer compound isexcellent in light emission efficiency.

The amount of the constitutional unit represented by the formula (Y) inwhich Ar^(Y1) is a divalent heterocyclic group or a divalent group inwhich at least one arylene group and at least one divalent heterocyclicgroup are bonded directly to each other is preferably 0.5 to 50 mol %,more preferably 3 to 30 mol %, with respect to the total amount ofconstitutional units contained in the third polymer compound, because alight emitting device produced by using the third polymer compound isexcellent in charge transportability.

The constitutional unit represented by the formula (Y) may be containedsingly or two or more of the constitutional units may be contained inthe third polymer compound.

The definition and examples of the at least one constitutional unitselected from the group consisting of a constitutional unit representedby the formula (Ia), a constitutional unit represented by the formula(Ib), a constitutional unit represented by the formula (Ic) and aconstitutional unit represented by the formula (Id) contained in thethird polymer compound are the same as the definition and examples ofthe at least one constitutional unit selected from the group consistingof a constitutional unit represented by the formula (Ia), aconstitutional unit represented by the formula (Ib), a constitutionalunit represented by the formula (Ic) and a constitutional unitrepresented by the formula (Id) contained in the first polymer compounddescribed above.

The amounts of a constitutional unit represented by the formula (Ia), aconstitutional unit represented by the formula (Ib), a constitutionalunit represented by the formula (Ic) and a constitutional unitrepresented by the formula (Id) are each preferably 0.1 to 10 mol %,more preferably 0.1 to 5 mol %, further preferably 0.1 to 3 mol %, withrespect to the total amount of constitutional units contained in thethird polymer compound, because a light emitting device produced byusing third polymer compound is excellent in electron transportability.

The constitutional unit represented by the formula (Ia), theconstitutional unit represented by the formula (Ib), the constitutionalunit represented by the formula (Ic) and the constitutional unitrepresented by the formula (Id) each may be contained singly or two ormore of each of the constitutional units may be contained in the thirdpolymer compound.

It is preferable that the third polymer compound further comprises aconstitutional unit represented by the formula (X), because a lightemitting device produced by using the third polymer compound isexcellent in hole transportability. The definition and examples of theconstitutional unit represented by the formula (X) are the same as thedefinition and examples of the constitutional unit represented by theformula (X) which may be contained in the first polymer compounddescribed above.

The amount of the constitutional unit represented by the formula (X) ispreferably 0.1 to 50 mol %, more preferably 1 to 40 mol %, furtherpreferably 5 to 30 mol %, with respect to the total amount ofconstitutional units contained in the third polymer compound, because alight emitting device produced by using the third polymer compound isexcellent in hole transportability.

The constitutional unit represented by the formula (X) may be containedsingly or two or more of the constitutional units may be contained inthe third polymer compound.

The definition and examples of the phosphorescent constitutional unitcontained in the third polymer compound are the same as the definitionand examples of the phosphorescent constitutional unit contained in thesecond polymer compound described above.

The amount of the phosphorescent constitutional unit is preferably 0.5to 50 mol %, more preferably 1 to 30 mol %, further preferably 3 to 15mol %, with respect to the total amount of constitutional unitscontained in the third polymer compound, because a light emitting deviceproduced by using the third polymer compound is excellent in lightemission efficiency.

The phosphorescent constitutional unit may be contained singly or two ormore of the phosphorescent constitutional units may be contained in thethird polymer compound.

The third polymer compound has a polystyrene-equivalent weight-averagemolecular weight of preferably 1×10⁴ to 5×10⁵ and apolystyrene-equivalent number-average molecular weight of preferably2×10³ to 4×10⁵.

The third polymer compound includes, for example, polymer compounds(P-15) to (P-21) shown in Table 3.

TABLE 3 constitutional unit and mole fraction thereof formula formula(Y) (X) phosphorescent formulae formulae formulae formulaeconstitutional (Y-1) (Y-4) (Y-8) (X-1) unit formulae to to to toformulae (1B) (Ia) polymer (Y-3) (Y-7) (Y-10) (X-7) to (4B) to (Id)others compound p″ q″ r″ s″ t″ u″ v″ (P-15) 0.1 to 0.1 to 0 0 0.1 to50.0 0.1 to 0 to 30 99.7 99.7 10.0 (P-16) 0.1 to 0 0.1 to 0 0.1 to 50.00.1 to 0 to 30 99.7 99.7 10.0 (P-17) 0.1 to 0 0 0.1 to 0.1 to 50.0 0.1to 0 to 30 99.7 99.7 10.0 (P-18) 0.1 to 0.1 to 0.1 to 0 0.1 to 50.0 0.1to 0 to 30 99.6 99.6 99.6 10.0 (P-19) 0.1 to 0.1 to 0 0.1 to 0.1 to 50.00.1 to 0 to 30 99.6 99.6 99.6 10.0 (P-20) 0.1 to 0 0.1 to 0.1 to 0.1 to50.0 0.1 to 0 to 30 99.6 99.6 99.6 10.0 (P-21) 0.1 to 0.1 to 0.1 to 0.1to 0.1 to 50.0 0.1 to 0 to 30 99.5 99.5 99.5 99.5 10.0[in the table, p″, q″, r″, s″, t″, u″ and v″ represent the mole fractionof each constitutional unit. p″+q″+r″+s″+t″+u″+v″=100 and100≧p″+q″+r″+s″+t″+u″≧70. The other constitutional unit denotes aconstitutional unit other than the constitutional unit represented bythe formula (Y), the constitutional unit represented by the formula (X),the phosphorescent constitutional unit and the constitutional unitrepresented by the formula (Ia) to the formula (Id).]

<Production Method of Polymer Compound>

The first to third polymer compounds may be any of a block copolymer, arandom copolymer, an alternative copolymer and a graft copolymer or maybe a polymer compound of the other embodiment, and are preferably acopolymer produced by copolymerizing several raw material monomers.

The first polymer compound can be produced, for example, bycondensation-polymerizing a compound represented by the formula (M-Y1),at least one compound selected from the group consisting of a compoundrepresented by the formula (M-Y2) and a compound represented by theformula (M-X), and at least one compound selected from the groupconsisting of a compound represented by the formula (M-Ia), a compoundrepresented by the formula (M-Ib), a compound represented by the formula(M-Ic) and a compound represented by the formula (M-Id).

When a compound represented by the formula (M-Ic) and a compoundrepresented by the formula (M-Id) are used, these compounds are used asan end-capping agent.

The second polymer compound can be produced, for example, bycondensation-polymerizing a compound represented by the formula (M-Y1),at least one compound selected from the group consisting of a compoundrepresented by the formula (M-Y2) and a compound represented by theformula (M-X), and at least one compound selected from the groupconsisting of a compound represented by the formula (M-1B), a compoundrepresented by the formula (M-2B), a compound represented by the formula(M-3B) and a compound represented by the formula (M-4B).

When a compound represented by the formula (M-1B) is used, this compoundis used as an end-capping agent.

Third polymer compound can be produced, for example, bycondensation-polymerizing a compound represented by the formula (M-Y1),at least one compound selected from the group consisting of a compoundrepresented by the formula (M-Y2) and a compound represented by theformula (M-X), at least one compound selected from the group consistingof a compound represented by the formula (M-Ia), a compound representedby the formula (M-Ib), a compound represented by the formula (M-Ic) anda compound represented by the formula (M-Id), and at least one compoundselected from the group consisting of a compound represented by theformula (M-1B), a compound represented by the formula (M-2B), a compoundrepresented by the formula (M-3B) and a compound represented by theformula (M-4B).

When a compound represented by the formula (M-Ic), a compoundrepresented by the formula (M-Id) and a compound represented by theformula (M-1B) are used, these compounds are used as an end-cappingagent.

In the present specification, compounds used in production of the firstto third polymer compounds are collectively called “raw materialmonomer” in some cases.

[wherein,

Ar^(Y1), Ar^(X1) to Ar^(X4), R^(X1), R^(X2), R^(X3), a^(x1), a^(X2), m,n, R^(Y1), R^(x), Ar, nA, L^(A), nB, L^(B), L^(c) to L^(e), M^(1B) toM^(3B), n^(c1), n^(d1) and n^(e1) represent the same meaning asdescribed above.

Z^(C1) to Z^(C20) each independently represent a group selected from thegroup consisting of Group A of substituent and Group B of substituent.]

For example, when Z^(C1) and Z^(C2) are a group selected from Group A ofsubstituent, a group selected from Group B of substituent is selectedfor Z^(C3) to Z^(C20).

For example, when Z^(C1) and Z^(C2) are a group selected from Group B ofsubstituent, a group selected from Group A of substituent is selectedfor Z^(C3) to Z^(C20).

<Group A of Substituent>

A chlorine atom, a bromine atom, an iodine atom and a group representedby —O—S(═O)₂R^(C1) (wherein, R^(C1) represents an alkyl group, acycloalkyl group or an aryl group, and these groups each optionally havea substituent.).

<Group B of Substituent>

A group represented by —B(OR^(C2))₂ (wherein, R^(C2) represents ahydrogen atom, an alkyl group, a cycloalkyl group or an aryl group, andthese groups each optionally have a substituent. The plurality of R^(C2)may be the same or different and may be combined together to form acyclic structure together with the oxygen atoms to which they areattached.);

a group represented by —BF₃Q′ (wherein, Q′ represents Li, Na, K, Rb orCs.);

a group represented by —MgY¹ (wherein, Y′ represents a chlorine atom, abromine atom or an iodine atom.);

a group represented by —ZnY″ (wherein, Y″ represents a chlorine atom, abromine atom or an iodine atom.); and

a group represented by —Sn(R^(C3))₃ (wherein, R^(C3) represents ahydrogen atom, an alkyl group, a cycloalkyl group or an aryl group, andthese groups each optionally have a substituent. The plurality of R^(C3)may be the sane or different and may be combined together to form acyclic structure together with the tin atom to which they areattached.).

As the group represented by —B(OR^(C2))₂, groups represented by thefollowing formulae are exemplified.

The compound having a group selected from Group A of substituent and thecompound having a group selected from Group B of substituent undergocondensation polymerization by a known coupling reaction, thereby givingmutual bonding of carbon atoms linking the group selected from Group Aof substituent and the group selected from Group B of substituent.Therefore, when a compound having one or more groups selected from GroupA of substituent and a compound having one or more groups selected fromGroup B of substituent are subjected to a known coupling reaction, acondensed polymer of these compounds can be produced by condensationpolymerization.

The condensation polymerization is carried out usually in the presenceof a catalyst, a base and a solvent, and if necessary, a phase transfercatalyst may coexist.

The catalyst includes, for example, transition metal complexes such aspalladium complexes such as dichlorobis(triphenylphosphine)palladium,dichlorobis(tris-o-methoxyphenylphosphine)palladium,palladium[tetrakis(triphenylphosphine)],[tris(dibenzylideneacetone)]dipalladium and palladium acetate, nickelcomplexes such as nickel[tetrakis(triphenylphosphine)],[1,3-bis(diphenylphosphino)propane]dichloronickel and[bis(1,4-cyclooctadiene)]nickel; these transition metal complexesfurther having a ligand such as triphenylphosphine,tri-o-tolylphosphine, tri(tert-butylphosphine), tricyclohexylphosphine,diphenylphosphinopropane and bipyridyl. The catalysts may be used singlyor in combination.

The use amount of the catalyst is usually 0.00001 to 3 molar equivalentsin terms of the amount of a transition metal with respect to the sum ofthe molar numbers of raw material monomers.

The base includes, for example, inorganic bases such as sodiumcarbonate, potassium carbonate, cesium carbonate, potassium fluoride,cesium fluoride and tripotassium phosphate; organic bases such astetrabutylammonium fluoride and tetrabutylammonium hydroxide. The baseseach may be used singly or in combination.

The phase transfer catalyst include, for example, tetrabutylammoniumchloride, tetrabutylammonium bromide and the like. The phase transfercatalysts each may be used singly or in combination.

The use amount of the base is each usually 0.001 to 100 molarequivalents with respect to the total molar number of raw materialmonomers.

The use amount of the phase transfer catalyst is each usually 0.001 to100 molar equivalents with respect to the total molar number of rawmaterial monomers.

The solvent includes, for example, organic solvents such as toluene,xylene, mesitylene, tetrahydrofuran, 1,4-dioxane, dimethoxyethane,N,N-dimethylacetamide and N,N-dimethylformamide; and water. The solventmay be used singly, or two or more solvents may be used in combination.

The use amount of the solvent is usually 10 to 100000 parts by weightwith respect to 100 parts by weight of the total amount of raw materialmonomers.

The reaction temperature of condensation polymerization is usually −100to 200° C. The reaction time is usually 1 hour or longer.

The post treatment of the polymerization reaction is conducted by knownmethods, such as a method of removing water-soluble impurities by liquidseparation and a method in which the reaction solution resulting fromthe polymerization reaction is added to a lower alcohol such as methanoland a precipitate deposited is collected by filtration and dried, thatare applied individually or in combination. When the polymer compoundhas a low purity, the polymer host can be purified by a usual method,such as recrystallization, reprecipitation, continuous extraction by aSoxhlet extractor and column chromatography.

<Other Component>

The composition of the present invention may further comprise at leastone material selected from the group consisting of a hole transportingmaterial, a hole injection material, an electron transporting material,an electron injection material, a light emitting material (the lightemitting material is different from the phosphorescent compound.), anantioxidant and a solvent.

The composition of the present invention may be a composition comprisingthe third polymer compound and at least one material selected from thegroup consisting of a hole transporting material, a hole injectionmaterial, an electron transporting material, an electron injectionmaterial, a light emitting material (the light emitting material isdifferent from a phosphorescent compound.), an antioxidant and asolvent.

The composition comprising a solvent (hereinafter, referred to as“ink”.) is suitable for fabrication of a light emitting device by usingan application method such as an inkjet printing method and a nozzleprinting method.

The viscosity of the ink may be adjusted depending on the kind of theapplication method, and when a solution goes through a dischargeapparatus such as in an inkjet printing method, the viscosity ispreferably in the range of 1 to 20 mPa·s at 25° C. because logging indischarging and curved aviation are unlikely.

As the solvent contained in the ink, those capable of dissolving oruniformly dispersing solid components in the ink are preferable. Thesolvent includes, for example, chlorine-based solvents such as1,2-dichloroethane, 1,1,2-trichloroethane, chlorobenzene ando-dichlorobenzene; ether solvents such as THF, dioxane, anisole and4-methylanisole; aromatic hydrocarbon solvents such as toluene, xylene,mesitylene, ethylbenzene, n-hexylbenzene and cyclohexylbenzene;aliphatic hydrocarbon solvents such as cyclohexane, methylcyclohexane,n-pentane, n-hexane, n-heptane, n-octane, n-nonane, n-decane, n-dodecaneand bicyclohexyl; ketone solvents such as acetone, methylethylketone,cyclohexanone and acetophenone; ester solvents such as ethyl acetate,butyl acetate, ethylcellosolve acetate, methyl benzoate and phenylacetate; polyhydric alcohol solvents such as ethylene glycol, glycerinand 1,2-hexanediol; alcohol solvents such as isopropylalcohol andcyclohexanol; sulfoxide solvents such as dimethyl sulfoxide; and amidesolvents such as N-methyl-2-pyrrolidone and N,N-dimethylformamide. Thesesolvents may be used singly, or two or more of them may be used incombination.

In the ink, the compounding amount of the solvent is usually 1000 to100000 parts by weight, preferably 2000 to 20000 parts by weight whenthe sum of the first polymer compound, and the phosphorescent compoundor the second polymer compound is 100 parts by weight (or when the thirdpolymer compound is 100 parts by weight).

[Hole Transporting Material]

The hole transporting material is classified into low molecular weightcompounds and polymer compounds, and polymer compounds are preferable,and polymer compounds having a crosslinkable group are more preferable.

The polymer compound includes, for example, polyvinylcarbazole andderivatives thereof; polyarylene having an aromatic amine structure inthe side chain or main chain and derivatives thereof. The polymercompound may also be a compound in which an electron accepting portionis linked. The electron accepting portion includes, for example,fullerene, tetrafluorotetracyanoquinodimethane, tetracyanoethylene,trinitrofluorenone, preferably fullerene.

In the composition of the present invention, the compounding amount ofthe hole transporting material is usually 1 to 400 parts by weight,preferably 5 to 150 parts by weight when the sum of the first polymercompound, and the phosphorescent compound or the second polymer compoundis 100 parts by weight (or when the third polymer compound is 100 partsby weight).

The hole transporting material may be used singly, or two or more holetransporting materials may be used in combination.

[Electron Transporting Material]

The electron transporting material is classified into low molecularweight compounds and polymer compounds. The electron transportingmaterial optionally has a crosslinkable group.

The low molecular weight compound includes, for example, a metal complexhaving 8-hydroxyquinoline as a ligand, oxadiazole, anthraquinodimethane,benzoquinone, naphthoquinone, anthraquinone,tetracyanoanthraquinodimethane, fluorenone, diphenyldicyanoethylene,diphenoquinone and derivatives thereof.

The polymer compound includes, for example, polyphenylene, polyfluoreneand derivatives thereof. These polymer compounds may be doped with ametal.

In the composition of the present invention, the compounding amount ofthe electron transporting material is usually 1 to 400 parts by weight,preferably 5 to 150 parts by weight when the sum of the first polymercompound, and the phosphorescent compound or the second polymer compoundis 100 parts by weight (or when the third polymer compound is 100 partsby weight).

The electron transporting material may be used singly, or two or moreelectron transporting materials may be used in combination.

[Hole Injection Material and Electron Injection Material]

The hole injection material and the electron injection material are eachclassified into low molecular weight compounds and polymer compounds.The hole injection material and the electron injection materialoptionally have a crosslinkable group.

The low molecular weight compound includes, for example, metalphthalocyanines such as copper phthalocyanine; carbon; oxides of metalssuch as molybdenum and tungsten; metal fluorides such as lithiumfluoride, sodium fluoride, cesium fluoride and potassium fluoride.

The polymer compound includes, for example, polyaniline, polythiophene,polypyrrole, polyphenylenevinylene, polythienylenevinylene,polyquinoline and polyquinoxaline, and derivatives thereof; electricallyconductive polymers such as a polymer comprising an aromatic aminestructure in the side chain or main chain.

In the composition of the present invention, the compounding amounts ofthe hole injection material and the electron injection material are eachusually 1 to 400 parts by weight, preferably 5 to 150 parts by weightwhen the sum of the first polymer compound, and the phosphorescentcompound or the second polymer compound is 100 parts by weight (or whenthe third polymer compound is 100 parts by weight).

The hole injection material and the electron injection material may eachbe used singly, or two or more of them may be used in combination.

[Ion Dope]

When the hole injection material or the electron injection materialcomprises an electrically conductive polymer, the electric conductivityof the electrically conductive polymer is preferably 1×10⁻⁵ S/cm to1×10³ S/cm. For adjusting the electric conductivity of the electricallyconductive polymer within such a range, the electrically conductivepolymer can be doped with a suitable amount of ions.

The kind of the ion to be doped is an anion for a hole injectionmaterial and a cation for an electron injection material. The anionincludes, for example, a polystyrenesulfonate ion, analkylbenzenesulfonate ion and a camphorsulfonate ion. The cationincludes, for example, a lithium ion, a sodium ion, a potassium ion anda tetrabutylammonium ion.

The ion to be doped may be used singly, or two or more ions to be dopedmay be used.

[Light Emitting Material]

The light emitting material (the light emitting material is differentform the phosphorescent compound.) is classified into low molecularweight compounds and polymer compounds. The light emitting materialoptionally has a crosslinkable group.

The low molecular weight compound includes, for example, naphthalene andderivatives thereof, anthracene and derivatives thereof, and peryleneand derivatives thereof.

The polymer compound includes, for example, polymer compounds comprisinga phenylene group, a naphthalenediyl group, a fluorenediyl group, aphenanthrenediyl group, dihydrophenanthrenediyl group, a grouprepresented by the formula (X), a carbazolediyl group, a phenoxazinediylgroup, a phenothiazinediyl group, an anthracenediyl group, a pyrenediylgroup and the like.

In the composition of the present invention, the compounding amount ofthe light emitting material is usually 0.1 to 400 parts by weight whenthe sum of the first polymer compound, and the phosphorescent compoundor the second polymer compound is 100 parts by weight (or when the thirdpolymer compound is 100 parts by weight).

[Antioxidant]

The antioxidant may advantageously be one which is soluble in the samesolvent as for the first polymer compound, and the phosphorescentcompound or the second polymer compound (or soluble in the same solventas for the third polymer compound), and does not disturb light emissionand charge transportation, and the examples thereof include phenol-basedantioxidants and phosphorus-based antioxidants.

In the composition of the present invention, the compounding amount ofthe antioxidant is usually 0.001 to 10 parts by weight when the sum ofthe first polymer compound, and the phosphorescent compound or thesecond polymer compound is 100 parts by weight (or when the thirdpolymer compound is 100 parts by weight).

The antioxidant may be used singly, or two or more antioxidants may beused in combination.

<Film>

The film comprises the first polymer compound, and the phosphorescentcompound or the second polymer compound. The film may be one comprisingthe third polymer compound.

The film also includes an insolubilized film produced by insolubilizingthe first polymer compound or the phosphorescent compound or the secondpolymer compound (or the third polymer compound) in a solvent bycrosslinking. The insolubilized film is a film produced by crosslinkingthe first polymer compound or the phosphorescent compound or the secondpolymer compound (or the third polymer compound) by an external stimulussuch as heating and light irradiation. The insolubilized film can besuitably used for lamination of a light emitting device because theinsolubilized film is substantially insoluble in a solvent.

The heating temperature for crosslinking the film is usually 25 to 300°C., and because the light emission efficiency is improved, preferably 50to 250° C., more preferably 150 to 200° C.

The kind of light used in light irradiation for crosslinking the filmincludes, for example, ultraviolet light, near-ultraviolet light andvisible light.

The film is suitable as a light emitting layer, a hole transportinglayer or a hole injection layer in a light emitting device.

The film can be fabricated, for example, by a spin coating method, acasting method, a micro gravure coating method, a gravure coatingmethod, a bar coating method, a roll coating method, a wire bar coatingmethod, a dip coating method, a spray coating method, a screen printingmethod, a flexo printing method, an offset printing method, an inkjetprinting method, a capillary coating method or a nozzle coating method,using the ink.

The thickness of the film is usually 1 nm to 10 μm.

<Light Emitting Device>

The light emitting device of the present invention is a light emittingdevice produced by using the composition of the present invention, andmay be one in which the first polymer compounds or the phosphorescentcompounds or the second polymer compounds (or the third polymercompounds) are intramolecularly or intermolecularly cross-linked, or onein which the first polymer compounds or the phosphorescent compounds orthe second polymer compounds (or the third polymer compounds) areintramolecularly and intermolecularly cross-linked.

The constitution of the light emitting device of the present inventioncomprises, for example, electrodes consisting of an anode and a cathode,and a layer produced by using the metal complex of the present inventiondisposed between the electrodes.

[Layer Constitution]

The layer obtained by using the composition of the present invention (orthe third polymer compound) is usually at least one selected from alight emitting layer, a hole transporting layer, a hole injection layer,an electron transporting layer and an electron injection layer,preferably a light emitting layer. These layers comprise a lightemitting material, a hole transporting material, a hole injectionmaterial, an electron transporting material and an electron injectionmaterial, respectively. These layers can be formed by the same method asthe above-described film fabrication using inks prepared by dissolving alight emitting material, a hole transporting material, a hole injectionmaterial, an electron transporting material and an electron injectionmaterial, respectively, in the solvent described above.

The light emitting device comprises a light emitting layer between ananode and a cathode. The light emitting device of the present inventionpreferably comprises at least one of a hole injection layer and a holetransporting layer between an anode and a light emitting layer from thestandpoint of hole injectability and hole transportability, andpreferably comprises at least one of an electron injection layer and anelectron transporting layer between a cathode and a light emitting layerfrom the standpoint of electron injectability and electrontransportability.

The material of a hole transporting layer, an electron transportinglayer, a light emitting layer, a hole injection layer and an electroninjection layer includes the above-described hole transportingmaterials, electron transporting materials, light emitting materials,hole injection materials and electron injection materials, respectively,in addition to the composition of the present invention.

When the material of a hole transporting layer, the material of anelectron transporting layer and the material of a light emitting layerare soluble in a solvent which is used in forming a layer adjacent tothe hole transporting layer, the electron transporting layer and thelight emitting layer, respectively, in fabrication of a light emittingdevice, it is preferable that the materials have a crosslinkable groupto avoid dissolution of the materials in the solvent. After forming thelayers using the materials having a crosslinkable group, the layers canbe insolubilized by crosslinking the crosslinkable group.

Methods of forming respective layers such as a light emitting layer, ahole transporting layer, an electron transporting layer, a holeinjection layer and an electron injection layer in the light emittingdevice of the present invention include, for example, a method of vacuumvapor deposition from a powder and a method of film formation fromsolution or melted state when a low molecular weight compound is used,and, for example, a method of film formation from solution or meltedstate when a polymer compound is used.

The order and the number of layers to be laminated and the thickness ofeach layer are controlled in view of external quantum efficiency anddevice life.

[Substrate/Electrode]

The substrate in the light emitting device may advantageously be asubstrate on which an electrode can be formed and which does notchemically change in forming an organic layer, and is a substrate madeof a material such as, for example, glass, plastic and silicon. In thecase of an opaque substrate, it is preferable that an electrode mostremote from the substrate is transparent or semi-transparent.

The material of the anode includes, for example, electrically conductivemetal oxides and semi-transparent metals, preferably, indium oxide, zincoxide and tin oxide; electrically conductive compounds such asindium.tin.oxide (ITO) and indium.zinc.oxide; a composite of silver,palladium and copper (APC); NESA, gold, platinum, silver and copper.

The material of the cathode includes, for example, metals such aslithium, sodium, potassium, rubidium, cesium, beryllium, magnesium,calcium, strontium, barium, aluminum, zinc and indium; alloys composedof two or more of them; alloys composed of one or more of them and atleast one of silver, copper, manganese, titanium, cobalt, nickel,tungsten and tin; and graphite and graphite intercalation compounds. Thealloy includes, for example, a magnesium-silver alloy, amagnesium-indium alloy, a magnesium-aluminum alloy, an indium-silveralloy, a lithium-aluminum alloy, a lithium-magnesium alloy, alithium-indium alloy and a calcium-aluminum alloy.

The anode and the cathode may each take a lamination structure composedof two or more layers.

[Use]

For producing planar light emission by using a light emitting device, aplanar anode and a planar cathode are disposed so as to overlap witheach other. Patterned light emission can be produced by a method ofplacing a mask with a patterned window on the surface of a planer lightemitting device, a method of forming an extremely thick layer intendedto be a non-light emitting, thereby having the layer essentiallyno-light emitting or a method of forming an anode, a cathode or bothelectrodes in a patterned shape. By forming a pattern with any of thesemethods and disposing certain electrodes so as to switch ON/OFFindependently, a segment type display capable of displaying numbers andletters and the like is provided. For producing a dot matrix display,both an anode and a cathode are formed in a stripe shape and disposed soas to cross with each other. Partial color display and multi-colordisplay are made possible by a method of printing separately certainpolymer compounds showing different emission or a method of using acolor filter or a fluorescence conversion filter. The dot matrix displaycan be passively driven, or actively driven combined with TFT and thelike. These displays can be used in computers, television sets, portableterminals and the like. The planar light emitting device can be suitablyused as a planer light source for backlight of a liquid crystal displayor as a planar light source for illumination. If a flexible substrate isused, it can be used also as a curved light source and a curved display.

EXAMPLES

The present invention will be illustrated further in detail by examplesbelow, but the present invention is not limited to these examples.

In the present examples, the polystyrene-equivalent number averagemolecular weight (Mn) and the polystyrene-equivalent weight averagemolecular weight (Mw) of a polymer compound were measured by sizeexclusion chromatography (SEC) (manufactured by Shimadzu Corp., tradename: LC-10Avp). SEC measurement conditions are as described below.

[Measurement Condition]

The polymer compound to be measured was dissolved in tetrahydrofuran ata concentration of about 0.05 wt %, and 10 μL of the solution wasinjected into SEC. As the mobile phase of SEC, tetrahydrofuran was usedand allowed to flow at a flow rate of 2.0 mL/min. As the column, PLgelMIXED-B (manufactured by Polymer Laboratories) was used. As thedetector, UV-VIS detector (manufactured by Shimadzu Corp., trade name:SPD-10Avp) was used.

Measurement of NMR was carried out according to the following method.

5 to 10 mg of a measurement sample was dissolved in about 0.5 mL ofdeuterated chloroform (CDCl₃), deuterated tetrahydrofuran (THF-d₈) ordeuterated methylene chloride (CD₂Cl₂), and measurement was performedusing an NMR apparatus (manufactured by Agilent, Inc., trade name: INOVA300 or MERCURY 400VX).

As the index of the purity of a compound, a value of the highperformance liquid chromatography (HPLC) area percentage was used. Thisvalue is a value in high performance liquid chromatography (HPLC,manufactured by Shimadzu Corp., trade name: LC-20A) at 254 nm, unlessotherwise stated. In this operation, the compound to be measured wasdissolved in tetrahydrofuran or chloroform so as to give a concentrationof 0.01 to 0.2 wt %, and depending on the concentration, 1 to 10 μL ofthe solution was injected into HPLC. As the mobile phase of HPLC,acetonitrile and tetrahydrofuran were used and allowed to flow at a flowrate of 1 mL/min as gradient analysis of acetonitrile/tetrahydrofuran100/0 to 0/100 (volume ratio). As the column, Kaseisorb LC ODS 2000(manufactured by Tokyo Chemical Industry Co., Ltd.) or an ODS columnhaving an equivalent performance was used. As the detector, a photodiode array detector (manufactured by Shimadzu Corp., trade name:SPD-M20A) was used.

<Synthesis Example 1> Synthesis of Compound G1

A compound G1 was synthesized according to a method described inInternational Publication WO2009/131255.

<Synthesis Example 2> Synthesis of Compound R1

A compound R1 was synthesized according to a method described in JP-ANo. 2006-188673.

<Synthesis Example 3> Synthesis of Compound R2

A compound R2 was synthesized according to a method described in JP-ANo. 2008-179617.

The structures of monomers CM1 to CM11 used in synthesis of a polymercompound HP-1 and syntheses of polymer compounds EP-1 to EP-4 are shownbelow.

A monomer CM1 was synthesized according to a synthesis method describedin JP-A No. 2011-174062.

A monomer CM2 was synthesized according to a method described inInternational Publication WO2005/049546.

As a monomer CM3, a commercially available compound was used.

A monomer CM4 was synthesized according to a synthesis method describedin JP-A No. 2008-106241.

A monomer CM5 was synthesized according to a synthesis method describedin JP-A No. 2010-189630.

A monomer CM6 was synthesized according to a synthesis method describedin International Publication WO2012/866′71.

A monomer CM7 was synthesized according to a synthesis method describedin JP-A No. 2010-189630.

A monomer CM8 was synthesized according to a method described below.

A monomer CM9 was synthesized according to a synthesis method describedin JP-A No. 2004-143419.

A monomer CM10 was synthesized according to a method described inInternational Publication WO2009/131255.

A monomer CM11 was synthesized according to a method described below.

A monomer CM12 was synthesized according to a synthesis method describedin JP-A No. 2012-131993.

A monomer CM13 was synthesized according to a method described inInternational Publication WO2013/021180.

<Synthesis Example 4> Synthesis of Monomer CM8

A compound CM8′ was synthesized according to the synthesis method of themonomer CM6.

A nitrogen gas atmosphere was prepared in a reaction vessel, then, acompound CM8′ (100 g) and tetrahydrofuran (dehydrated product, 1000 ml)were added, and the mixture was cooled to −70° C. or lower by using adry ice/acetone bath. Thereafter, a 2.5 mol/L n-butyllithium-hexanesolution (126 ml) was dropped into this over a period of 45 minuteswhile keeping a temperature of −70° C. or lower, and the mixture wasstirred for 5 hours. Thereafter,2-isopropoxy-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (81 ml) was droppedinto this over a period of 30 minutes while keeping a temperature of−70° C. or lower. Thereafter, the dry ice/acetone bath was removed, andthe mixture was stirred overnight at room temperature. The resultantreaction mixture was cooled down to −30° C., and a 2M hydrochloricacid-diethyl ether solution was dropped to adjust pH to 6 to 7, then,the mixture was concentrated under reduced pressure, thereby obtaining asolid. To the resultant solid was added toluene, and the mixture wasstirred at room temperature for 1 hour, then, the solution was allowedto pass through a filter paved with silica gel, thereby obtaining afiltrate. The resultant filtrate was concentrated under reducedpressure, thereby obtaining a solid. To the resultant solid was addedmethanol and the mixture was stirred, then, filtrated, thereby obtaininga solid. The resultant solid was purified by repeating recrystallizationusing isopropyl alcohol 4 times, then, dried under reduced pressure at50° C. overnight, thereby obtaining a monomer CM8 (72 g) as a whitesolid. The resultant monomer CM8 showed a HPLC area percentage value(detection wavelength: UV 280 nm) of 99.0%.

¹H-NMR (400 MHz, CDCl₃) δ (ppm)=7.82 (d, 2H), 7.81 (s, 2H), 7.76 (d,2H), 7.11 (d, 4H), 7.00 (d, 4H), 2.52 (t, 4H), 1.59 to 1.54 (m, 4H),1.36 to 1.26 (m, 20H), 1.31 (s, 24H), 0.87 (t, 6H).

<Synthesis Example 5> Synthesis of Monomer CM11 (Step 1) Synthesis ofCompound A

A nitrogen gas atmosphere was prepared in a reaction vessel, then,fluorene (50 g) and dehydrated diethyl ether (500 ml) were added, andthe mixture was cooled to 10° C. or lower. Thereafter, into this, an-butyllithium hexane solution (2.5 M, 138 ml) was dropped. Theresultant reaction solution was heated up to room temperature, then,dropped into a mixed solution of chlorotrimethylsilane (46 ml) anddehydrated diethyl ether (700 ml) which had been cooled to 20° C. orlower in a separate reaction vessel. The resultant reaction solution washeated up to room temperature, and stirred overnight. The resultantreaction mixture was cooled to room temperature or lower, and water (10ml) was dropped. The resultant reaction mixture was washed with water(250 ml) three times, then, separated into an aqueous layer and anorganic layer. To the resultant organic layer was added anhydrousmagnesium sulfate, and the mixture was stirred, then, filtrated, and theresultant filtrate was concentrated, thereby obtaining a solid. Theresultant solid was recrystallized using n-hexane three times, therebyobtaining a compound A (25.8 g) as an orange solid. The yield was 36%.

¹H-NMR (300 MHz, CDCl₃) δ (ppm)=7.86 (d, 2H), 7.50 (d, 2H), 7.37-7.26(m, 4H), 3.87 (s, 1H), −0.07 (s, 9H).

(Step 2) Synthesis of Monomer CM11

A nitrogen gas atmosphere was prepared in a reaction vessel, then, acompound A (25.8 g) and dehydrated diethyl ether (500 ml) were added,and the mixture was cooled to 10° C. or lower. Thereafter, in to this, an-butyllithium hexane solution (2.5 M, 40 ml) was dropped, and themixture was stirred for 15 minutes while cooling to 10° C. or lower. Theresultant reaction solution was heated up to 25° C., then,3,5-dibromobenzaldehyde (28.8 g) was added, and the mixture was stirredfor 1.5 hours at 25° C. The resultant reaction mixture was cooled to 0°C., then, water (2 ml) was dropped, and the mixture was stirred. Theresultant reaction mixture was washed with water (100 ml) three times,then, separated into an aqueous layer and an organic layer. To theresultant organic layer was added anhydrous magnesium sulfate, and themixture was stirred, then, filtrated, and the resultant filtrate wasconcentrated, thereby obtaining a solid. The resultant solid wasrecrystallized using n-hexane three times, thereby obtaining a solid.The resultant solid was dissolved in a mixed solvent of toluene (50 ml)and n-hexane (500 ml) at 50° C., then, filtrated, and the resultantfiltrate was concentrated down to about 200 mL. The resultantconcentrated solution was cooled to room temperature or lower to obtaina solid which was then filtrated and dried, thereby obtaining a monomerCM11 (19.7 g) as a yellow solid. The yield was 49%. The resultantmonomer CM11 showed a HPLC area percentage value of 99.5% or more.

¹H-NMR (300 MHz, CDCl₃) δ (ppm)=7.76 to 7.63 (m, 6H), 7.50 to 7.28 (m,5H), 7.12 (dt, 1H).

<Synthesis Example 6> Synthesis of Polymer Compound HP-1

A polymer compound HP-1 was synthesized according to a synthesis methoddescribed in JP-A No. 2012-144722 by using monomers shown in Table 4described below. The polymer compound HP-1 had a Mn of 1.0×10⁵ and a Mwof 2.4×10⁵. The polymer compound HP-1 is a copolymer constituted ofconstitutional units derived from respective monomers at a molar ratioshown in Table 4 described below according to the theoretical valuescalculated from the charged raw materials.

TABLE 4 monomer CM1 CM2 CM3 CM4 HP-1 molar ratio [mol %] 50 30 12.5 7.5

<Synthesis Example 7> Synthesis of Polymer Compound EP-1

A polymer compound EP-1 was synthesized according to a synthesis methoddescribed in JP-A No. 2012-36388 by using monomers shown in Table 5described below. The polymer compound EP-1 had a Mn of 5.8×10⁴ and a Mwof 1.2×10⁵. The polymer compound EP-1 is a copolymer constituted ofconstitutional units derived from respective monomers at a molar ratioshown in Table 5 described below according to the theoretical valuescalculated from the charged raw materials.

TABLE 5 monomer CM5 CM6 CM7 EP-1 molar ratio [mol %] 50 40 10

<Synthesis Example 8> Synthesis of Polymer Compound EP-2

(Step 1) An inert gas atmosphere was prepared in a reaction vessel,then, a monomer CM5 (3.94 g), a monomer CM6 (4.18 g), a monomer CM7(1.06 g), a monomer CM11 (0.07 g),dichlorobis(tris-o-methoxyphenylphosphine)palladium (2.2 mg) and toluene(109 g) were added, and the mixture was heated at 100° C.

(Step 2) Into the reaction liquid, a 20 wt % tetraethylammoniumhydroxide aqueous solution (30 g) was dropped, and the mixture wasrefluxed for 8.0 hours.

(Step 3) Thereafter, to this were added phenylboronic acid (105 mg) anddichlorobis(tris-o-methoxyphenylphosphine)palladium (7.3 mg), and themixture was refluxed for 14.0 hours.

(Step 4) Thereafter, to this was added a sodium diethyldithiacarbamateaqueous solution, and the mixture was stirred at 40° C. for 3 hours. Thereaction liquid was washed with water once, then, water was removed byperforming distillation under reduced pressure, and the deposited solidwas separated by filtration. The resultant solution was washed with a 10wt % hydrochloric acid aqueous solution twice, with a 3 wt % ammoniaaqueous solution twice and with water twice, then, purified by allowingit to pass through a column filled with a mixture of alumina and silicagel. The resultant solution was dropped into methanol, and the mixturewas stirred, then, the resultant precipitate was isolated by filtration,and dried, thereby obtaining 4.9 g of a polymer compound EP-2. Thepolymer compound EP-2 had a Mn of 5.9×10⁴ and a Mw of 1.3×10⁵.

The polymer compound EP-2 is a copolymer constituted of constitutionalunits derived from respective monomers at a molar ratio shown in Table 6described below according to the theoretical values calculated from thecharged raw materials.

TABLE 6 monomer CM5 CM6 CM7 CM11 EP-2 molar ratio [mol %] 50 39 10 1

<Synthesis Example 9> Synthesis of Polymer Compound EP-3

(Step 1) An inert gas atmosphere was prepared in a reaction vessel,then, a monomer CM8 (4.7686 g), a monomer CM3 (1.9744 g), a monomer CM6(0.7734 g), a monomer CM9 (0.4432 g), a monomer CM10 (0.3308 g) andtoluene (67 ml) were added, and the mixture was heated at 105° C.

(Step 2) To the reaction liquid was added bistriphenylphosphinepalladiumdichloride (4.2 mg), then, a 20 wt % tetraethylammonium hydroxideaqueous solution (20 ml) was dropped, then, the mixture was refluxed for3 hours.

(Step 3) Thereafter, to this were added phenylboronic acid (0.077 g),bistriphenylphosphinepalladium dichloride (4.2 mg), toluene (60 ml) anda 20 wt % tetraethylammonium hydroxide aqueous solution (20 ml), and themixture was refluxed for 24 hours.

(Step 4) Thereafter, an organic layer was separated from an aqueouslayer. To the resultant organic layer were added sodiumN,N-diethyldithiocarbamate trihydrate (3.33 g) and ion exchanged water(67 ml), and the mixture was stirred at 85° C. for 2 hours. An organiclayer was separated from an aqueous layer, then, the resultant organiclayer was washed with ion exchanged water (78 ml) twice, with a 3 wt %acetic acid aqueous solution (78 ml) twice and with ion exchanged water(78 ml) twice in this order. An organic layer was separated from anaqueous layer, then, the resultant organic layer was dropped intomethanol to cause precipitation of a solid which was then isolated byfiltration, and dried, thereby obtaining a solid. The resultant solidwas dissolved in toluene, and the solution was allowed to pass through asilica gel column and an alumina column through which toluene hadpreviously passed. The resultant solution was dropped into methanol tocause precipitation of a solid which was then isolated by filtration,and dried, thereby obtaining a polymer compound EP-3 (4.95 g). Thepolymer compound EP-3 had a Mn of 1.4×10⁵ and a Mw of 4.1×10⁵.

The polymer compound EP-3 is a copolymer constituted of constitutionalunits derived from respective monomers at a molar ratio shown in Table 7described below according to the theoretical values calculated from thecharged raw materials.

TABLE 7 monomer CM8 CM3 CM6 CM9 CM10 EP-3 molar ratio [mol %] 50 30 10 55

<Synthesis Example 10> Synthesis of Polymer Compound EP-4

(Step 1) An inert gas atmosphere was prepared in a reaction vessel,then, a monomer CM8 (4.70 g), a monomer CM3 (2.05 g), a monomer CM6(0.80 g), a monomer CM9 (0.34 g), a monomer CM10 (0.46 g), a monomerCM11 (0.05 g), dichlorobis(tris-o-methoxyphenylphosphine)palladium (1.6mg) and toluene (117 g) were added, and the mixture was heated at 100°C.

(Step 2) Into the reaction liquid, a 20 wt % tetraethylammoniumhydroxide aqueous solution (22 g) was dropped, and the mixture wasrefluxed for 6.4 hours.

(Step 3) Thereafter, to this were added phenylboronic acid (80 mg) anddichlorobis(tris-o-methoxyphenylphosphine)palladium (5.5 mg), and themixture was refluxed for 15.0 hours.

(Step 4) Thereafter, to this was added a sodium diethyldithiacarbamateaqueous solution, and the mixture was stirred at 40° C. for 3 hours. Thereaction liquid was washed with water once, then, water was removed byperforming distillation under reduced pressure, and the deposited solidwas separated by filtration. The resultant solution was washed with a 10wt % hydrochloric acid aqueous solution twice, with a 3 wt % ammoniaaqueous solution twice and with water twice, then, purified by allowingit to pass through a column filled with a mixture of alumina and silicagel. The resultant solution was dropped into methanol, and the mixturewas stirred, then, the resultant precipitate was isolated by filtration,and dried, thereby obtaining 5.1 g of a polymer compound EP-4. Thepolymer compound EP-4 had a Mn of 4.7×10⁴ and a Mw of 1.1×10⁵.

The polymer compound EP-4 is a copolymer constituted of constitutionalunits derived from respective monomers at a molar ratio shown in Table 8described below according to the theoretical values calculated from thecharged raw materials.

TABLE 8 monomer CM8 CM3 CM6 CM9 CM10 CM11 EP-4 molar ratio 50 29 10 5 51 [mol %]

<Synthesis Example 11> Synthesis of Polymer Compound EP-5

(Step 1) An inert gas atmosphere was prepared in a reaction vessel,then, a monomer CM5 (0.99 q), a monomer CM6 (0.50 g), a monomer CM12(0.16 g), a monomer CM7 (0.31 g), a monomer CM13 (0.51 g), a monomerCM11 (0.0083 g) and toluene (33 ml) were added, and the mixture washeated at 105° C.

(Step 2) Into the reaction liquid, a mixed liquid of a 40 wt %tetrabutylammonium hydroxide aqueous solution (14 g) and ion exchangedwater (41 g) was dropped, then,dichlorobis(tris-o-methoxyphenylphosphine)palladium (3.6 mg) was added,then, the mixture was refluxed for 8 hours.

(Step 3) After the reaction, to this were added phenylboronic acid (98mg) and dichlorobis(tris-o-methoxyphenylphosphine)palladium (1.8 mg),and the mixture was refluxed for 16 hours.

(Step 4) The resultant reaction mixture was cooled, then, washed with 10wt % hydrochloric acid twice, with a 3 wt % ammonia aqueous solutiontwice and with water twice. The resultant solution was dropped intomethanol, thereby causing precipitation. The resultant precipitate wasdissolved in toluene, then, purified by passing through an aluminacolumn and a silica gel column in this order. The resultant solution wasdropped into methanol, and the mixture was stirred, thereby causingprecipitation. The resultant precipitate was isolated by filtration, anddried, thereby obtaining 1.3 g of a polymer compound EP-5. The polymercompound EP-5 had a Mn of 5.21×10⁴ and a Mw of 1.23×10⁵.

The polymer compound EP-5 is a copolymer constituted of constitutionalunits derived from respective monomers at a molar ratio shown in Table 9described below according to the theoretical values calculated from thecharged raw materials.

TABLE 9 monomer CM5 CM6 CM12 CM7 CM13 CM11 EP-5 molar ratio 50 19.5 1012 8 0.5 [mol %]

<Synthesis Example 12> Synthesis of Polymer Compound EP-6

(Step 1) An inert gas atmosphere was prepared in a reaction vessel,then, a monomer CH5 (0.25 q), a monomer CM6 (0.13 g), a monomer CM12(0.040 g), a monomer CM7 (0.076 g), a monomer CM13 (0.13 g) and toluene(10 ml) were added, and the mixture was heated at 105° C.

(Step 2) To the reaction liquid were added palladium acetate (0.2 mg)and tris(2-methoxyphenyl)phosphine (1.4 mg), then, a 20 wt %tetraethylammonium hydroxide aqueous solution (2.5 ml) was added, then,the mixture was refluxed for 4.5 hours.

(Step 3) After the reaction, to this were added phenylboric acid (12.2mg), palladium acetate (0.2 mg), tris(2-methoxyphenyl)phosphine (1.4 mg)and a 20 wt % tetraethylammonium hydroxide aqueous solution (2.5 ml),and the mixture was refluxed for 14 hours.

(Step 4) The resultant reaction mixture was cooled, then, an aqueouslayer was removed. To the resultant organic layer were added sodiumN,N-diethyldithiocarbamate trihydrate (0.14 g) and ion exchanged water(2.7 ml), then, the mixture was stirred at 85° C. for 2 hours. Theresultant solution was separated into an organic layer and an aqueouslayer, then, the resultant organic layer was washed with 3.6 wt %hydrochloric acid twice, with 2.5 wt % ammonia water twice and with ionexchanged water four times. The resultant solution was dropped intomethanol, thereby causing precipitation. The resultant precipitate wasdissolved in toluene, then, purified by passing through an aluminacolumn and a silica gel column in this order. The resultant solution wasdropped into methanol, and the mixture was stirred, thereby causingprecipitation. The resultant precipitate was isolated by filtration, anddried, thereby obtaining 0.35 g of a polymer compound EP-6. The polymercompound EP-6 had a Mn of 6.60×10⁴ and a Mw of 2.01×10⁵.

The polymer compound EP-6 is a copolymer constituted of constitutionalunits derived from respective monomers at a molar ratio shown in Table10 described below according to the theoretical values calculated fromthe charged raw materials.

TABLE 10 monomer CM5 CM6 CM12 CM7 CM13 EP-6 molar ratio [mol %] 50 20 1012 8

<Example D1> Fabrication and Evaluation of Light Emitting Device D1(Formation of Anode and Hole Injection Layer)

A glass substrate was attached with an ITO film with a thickness of 45nm by a sputtering method, thereby forming an anode. On the anode, apolythiophene.sulfonic acid type hole injection agent AQ-1200(manufactured by Plextronics) was spin-coated to form a film with athickness of 50 nm, and the film was heated on a hot plate at 170° C.for 15 minutes under an air atmosphere, thereby forming a hole injectionlayer.

(Formation of Hole Transporting Layer)

A polymer compound HP-1 was dissolved at a concentration of 0.6 wt % inxylene. The resultant xylene solution was spin-coated on the holeinjection layer to form a film with a thickness of 20 nm, and the filmwas heated on a hot plate at 180° C. for 60 minutes under a nitrogen gasatmosphere, thereby forming a hole transporting layer.

(Formation of Light Emitting Layer)

Next, a xylene solution (2.2 wt %) of a polymer compound EP-2 and axylene solution (2.2 wt %) of a compound G1 were prepared. Then, thexylene solutions were mixed so that the solid content ratio of thepolymer compound EP-2 to the compound G1 was 60:40 (by weight). Thisxylene solution was spin-coated on the hole transporting layer to form afilm with a thickness of 80 nm, and this was heated on a hot plate at150° C. for 10 minutes in a nitrogen gas atmosphere, thereby forming alight emitting layer.

(Formation of Cathode)

The substrate carrying the light emitting layer formed thereon wasplaced in a vapor deposition machine, and the pressure was reduced to1.0×10⁻⁴ Pa or less, then, as a cathode, sodium fluoride wasvapor-deposited with a thickness of about 7 nm on the light emittinglayer, then, aluminum was vapor-deposited with a thickness of about 100nm on the sodium fluoride layer. After vapor deposition, encapsulatingwas performed by using a glass substrate, thereby fabricating a lightemitting device D1.

(Evaluation of Light Emitting Device)

Voltage was applied to the light emitting device D1, to observe green ELemission. The electric current value was set so that the initialluminance was 24000 cd/m², then, the device was driven at constantcurrent, and the required time until when the light emission luminancereached 70% of the initial luminance (hereinafter, referred to as LT70)was measured, to find a time of 65 hours.

<Example D4> Fabrication and Evaluation of Light Emitting Device D4

A light emitting device D4 was fabricated in the same manner as inExample D1, excepting that a xylene solution (1.8 wt %) of a polymercompound EP-5 was used instead of the xylene solution obtained by mixinga xylene solution (2.2 wt %) of a polymer compound EP-2 and a xylenesolution (2.2 wt %) of a compound G1 (solid content ratio of polymercompound EP-2 to compound G1 is 60:40 (by weight)) in Example D1.

Voltage was applied to the light emitting device D4, to observe green ELemission. The electric current value was set so that the initialluminance was 24000 cd/m², then, the device was driven at constantcurrent, and LT70 was measured, to find a time of 90 hours.

<Example D5> Fabrication and Evaluation of Light Emitting Device D5

A light emitting device D5 was fabricated in the same manner as inExample D1, excepting that a xylene solution obtained by mixing a xylenesolution (1.8 wt %) of a polymer compound EP-6 and a xylene solution(1.8 wt %) of a polymer compound EP-2 (solid content ratio of polymercompound EP-6 to polymer compound EP-2 is 80:20 (by weight)) was usedinstead of the xylene solution obtained by mixing a xylene solution (2.2wt %) of a polymer compound EP-2 and a xylene solution (2.2 wt %) of acompound G1 (solid content ratio of polymer compound EP-2 to compound G1is 60:40 (by weight)) in Example D1.

Voltage was applied to the light emitting device D5, to observe green ELemission. The electric current value was set so that the initialluminance was 24000 cd/m², then, the device was driven at constantcurrent, and LT70 was measured, to find a time of 52 hours.

<Comparative Example CD1> Fabrication and Evaluation of Light EmittingDevice CD1

A light emitting device CD1 was fabricated in the same manner as inExample D1, excepting that a polymer compound EP-1 was used instead ofthe polymer compound EP-2 in Example D1.

Voltage was applied to the light emitting device CD1, to observe greenEL emission. The electric current value was set so that the initialluminance was 24000 cd/m², then, the device was driven at constantcurrent, and LT70 was measured, to find a time of 32 hours.

<Example D2> Fabrication and Evaluation of Light Emitting Device D2

A light emitting device D2 was fabricated in the same manner as inExample D1, excepting that a xylene solution obtained by mixing a xylenesolution (1.8 wt %) of a polymer compound EP-4 and a xylene solution(1.8 wt %) of a compound R2 (solid content ratio of polymer compoundEP-4 to compound R2 is 92.5:7.5 (by weight)) was used instead of thexylene solution obtained by mixing a xylene solution (2.2 wt %) of apolymer compound EP-2 and a xylene solution (2.2 wt %) of a compound G1(solid content ratio of polymer compound EP-2 to compound G1 is 60:40(by weight)) in Example D1.

Voltage was applied to the light emitting device D2, to observe red ELemission. The electric current value was set so that the initialluminance was 24000 cd/m², then, the device was driven at constantcurrent, and LT70 was measured, to find a time of 109 hours.

<Comparative Example CD2> Fabrication and Evaluation of Light EmittingDevice CD2

A light emitting device CD2 was fabricated in the same manner as inExample D2, excepting that a polymer compound EP-3 was used instead ofthe polymer compound EP-4 in Example D2.

Voltage was applied to the light emitting device CD2, to observe red ELemission. The electric current value was set so that the initialluminance was 24000 cd/m², then, the device was driven at constantcurrent, and LT70 was measured, to find a time of 89 hours.

<Example D3> Fabrication and Evaluation of Light Emitting Device D3

A light emitting device D3 was fabricated in the same manner as inExample D2, excepting that a compound R1 was used instead of thecompound R2 in Example D2.

Voltage was applied to the light emitting device D3, to observe red ELemission. The electric current value was set so that the initialluminance was 12000 cd/m², then, the device was driven at constantcurrent, and LT70 was measured, to find a time of 107 hours.

<Comparative Example CD3> Fabrication and Evaluation of Light EmittingDevice CD3

A light emitting device CD3 was fabricated in the same manner as inExample D3, excepting that a polymer compound EP-3 was used instead ofthe polymer compound EP-4 in Example D3.

Voltage was applied to the light emitting device CD2, to observe red ELemission. The electric current value was set so that the initialluminance was 12000 cd/m², then, the device was driven at constantcurrent, and LT70 was measured, to find a time of 89 hours.

INDUSTRIAL APPLICABILITY

The composition and the polymer compound of the present invention areuseful for production of a light emitting device excellent in luminancelife.

1. A composition comprising a polymer compound comprising aconstitutional unit represented by the following formula (Y) and atleast one constitutional unit selected from the group consisting of aconstitutional unit represented by the following formula (Ia), aconstitutional unit represented by the following formula (Ib), aconstitutional unit represented by the following formula (Ic) and aconstitutional unit represented by the following formula (Id), and aphosphorescent compound:Ar^(Y1)  (Y) wherein Ar^(Y1) represents an arylene group, a divalentheterocyclic group or a divalent group in which at least one arylenegroup and at least one divalent heterocyclic group are bonded directlyto each other, and these groups each optionally have a substituent:

wherein m represents an integer of 0 to 4, and the plurality of m may bethe same or different, n represents an integer of 0 to 3, and theplurality of n may be the same or different, R^(T1) represents an alkylgroup, a cycloalkyl group, an alkoxy group, a cycloalkoxy group, an arylgroup or a monovalent heterocyclic group and these groups eachoptionally have a substituent, and when a plurality of R^(T1) arepresent, they may be the same or different, R^(x) represents a hydrogenatom, an alkyl group, a cycloalkyl group, an alkoxy group, a cycloalkoxygroup, an aryl group or a monovalent heterocyclic group and these groupseach optionally have a substituent, and the plurality of R^(X) may bethe same or different and may be combined together to form a ringtogether with the carbon atoms to which they are attached, Ar representsan aromatic hydrocarbon group or a heterocyclic group and these groupseach optionally have a substituent, nA represents an integer of 0 to 3,L^(A) represents an alkylene group, a cycloalkylene group, an arylenegroup or a divalent heterocyclic group and these groups each optionallyhave a substituent, and when a plurality of L^(A) are present, they maybe the same or different, nB represents an integer of 0 to 3, L^(B)represents an alkylene group, a cycloalkylene group, an arylene group ora divalent heterocyclic group and these groups each optionally have asubstituent, and when a plurality of L^(A) are present, they may be thesame or different.
 2. The composition according to claim 1, wherein theconstitutional unit represented by the formula (Ia) is a constitutionalunit represented by the following formula (Ie):

wherein Ar and R^(x) represent the same meaning as described above. 3.The composition according to claim 1, wherein the constitutional unitrepresented by the formula (Ib) is a constitutional unit represented bythe following formula (If):

wherein R^(x) represents the same meaning as described above.
 4. Thecomposition according to claim 1, wherein the constitutional unitrepresented by the formula (Y) is a constitutional unit represented bythe following formula (Y-1), (Y-2), (Y-3) or (Y-4):

wherein R^(Y1) represents a hydrogen atom, an alkyl group, a cycloalkylgroup, an alkoxyl group, a cycloalkoxy group, an aryl group or amonovalent heterocyclic group and these groups each optionally have asubstituent, and the plurality of R^(Y1) may be the same or different,and groups R^(Y1) may be combined together to form a ring together withthe carbon atoms to which they are attached:

wherein R^(Y1) represents the same meaning as described above, andX^(Y1) represents a group represented by —C(R^(Y2))₂—,—C(R^(Y2))═C(R^(Y2))— or —C(R^(Y2))₂—C(R^(Y2))₂—, R^(Y2) represents ahydrogen atom, an alkyl group, a cycloalkyl group, an alkoxyl group, acycloalkoxy group, an aryl group or a monovalent heterocyclic group andthese groups each optionally have a substituent, and the plurality ofR^(Y2) may be the same or different and R^(Y2)s may be combined togetherto form a ring together with the carbon atoms to which they areattached:

wherein R^(Y1) represents the same meaning as described above, andR^(Y3) represents a hydrogen atom, an alkyl group, a cycloalkyl group,an alkoxy group, a cycloalkoxy group, an aryl group or a monovalentheterocyclic group and these groups each optionally have a substituent.5. The composition according to claim 1, wherein the phosphorescentcompound is a phosphorescent compound represented by the followingformula (1):

wherein M represents a ruthenium atom, a rhodium atom, a palladium atom,an iridium atom or a platinum atom, n¹ represents an integer of 1 ormore, n² represents an integer of 0 or more, and n¹+n² is 2 or 3, andn¹+n² is 3 when M is a ruthenium atom, a rhodium atom or an iridiumatom, while n¹+n² is 2 when M is a palladium atom or a platinum atom, E¹and E² each independently represent a carbon atom or a nitrogen atom,and at least one of E¹ and E² is a carbon atom, the ring R¹ represents a5-membered or 6-membered aromatic heterocyclic ring and these ringsoptionally have a substituent, and when a plurality of the substituentsare present, they may be the same or different and may be combinedtogether to form a ring together with the atoms to which they areattached, and when a plurality of the rings R¹ are present, they may bethe same or different, and E¹ is a carbon atom when the ring R¹ is a6-membered aromatic heterocyclic ring, the ring R² represents a5-membered or 6-membered aromatic hydrocarbon ring or a 5-membered or6-membered aromatic heterocyclic ring and these rings optionally have asubstituent, and when a plurality of the substituents are present, theymay be the same or different and may be combined together to form a ringtogether with the atoms to which they are attached, and when a pluralityof the rings R² are present, they may be the same or different, and E²is a carbon atom when the ring R² is a 6-membered aromatic heterocyclicring, and A¹-G¹-A² represents an anionic bidentate ligand, A¹ and A²each independently represent a carbon atom, an oxygen atom or a nitrogenatom and these atoms may be an atom constituting a ring, G¹ represents asingle bond or an atomic group constituting the bidentate ligandtogether with A¹ and A², and when a plurality of A¹-G¹-A² are present,they may be the same or different.
 6. The composition according to claim1, wherein the phosphorescent compound is a polymer compound comprisinga phosphorescent constitutional unit having a group obtained by removingone or more hydrogen atoms bonding directly to carbon atoms or heteroatoms constituting a phosphorescent compound represented by thefollowing formula (1):

wherein M represents a ruthenium atom, a rhodium atom, a palladium atom,an iridium atom or a platinum atom, n¹ represents an integer of 1 ormore, n² represents an integer of 0 or more, and n¹+n² is 2 or 3, andn¹+n² is 3 when M is a ruthenium atom, a rhodium atom or an iridiumatom, while n¹+n² is 2 when M is a palladium atom or a platinum atom, E¹and E² each independently represent a carbon atom or a nitrogen atom,and at least one of E¹ and E² is a carbon atom, the ring R¹ represents a5-membered or 6-membered aromatic heterocyclic ring and these ringsoptionally have a substituent, and when a plurality of the substituentsare present, they may be the same or different and may be combinedtogether to form a ring together with the atoms to which they areattached, and when a plurality of the rings R¹ are present, they may bethe same or different, and E¹ is a carbon atom when the ring R¹ is a6-membered aromatic heterocyclic ring, the ring R² represents a5-membered or 6-membered aromatic hydrocarbon ring or a 5-membered or6-membered aromatic heterocyclic ring and these rings optionally have asubstituent, and when a plurality of the substituents are present, theymay be the same or different and may be combined together to form a ringtogether with the atoms to which they are attached, and when a pluralityof the rings R² are present, they may be the same or different, and E²is a carbon atom when the ring R² is a 6-membered aromatic heterocyclicring, and A¹-G¹-A² represents an anionic bidentate ligand, A¹ and A²each independently represent a carbon atom, an oxygen atom or a nitrogenatom and these atoms may be an atom constituting a ring, G¹ represents asingle bond or an atomic group constituting the bidentate ligandtogether with A¹ and A², and when a plurality of A¹-G¹-A² are present,they may be the same or different.
 7. A polymer compound comprising aconstitutional unit represented by the following formula (Y), at leastone constitutional unit selected from the group consisting of aconstitutional unit represented by the following formula (Ia), aconstitutional unit represented by the following formula (Ib), aconstitutional unit represented by the following formula (Ic) and aconstitutional unit represented by the following formula (Id), and aphosphorescent constitutional unit having a group obtained by removingone or more hydrogen atoms bonding directly to carbon atoms or heteroatoms constituting a phosphorescent compound represented by thefollowing formula (1):Ar^(Y1)  (Y) wherein Ar^(Y1) represents an arylene group, a divalentheterocyclic group or a divalent group in which at least one arylenegroup and at least one divalent heterocyclic group are bonded directlyto each other, and these groups each optionally have a substituent:

wherein m represents an integer of 0 to 4, and the plurality of m may bethe same or different, n represents an integer of 0 to 3, and theplurality of n may be the same or different, R^(T1) represents an alkylgroup, a cycloalkyl group, an alkoxy group, a cycloalkoxy group, an arylgroup or a monovalent heterocyclic group and these groups eachoptionally have a substituent, and when a plurality of R^(T1) arepresent, they may be the same or different, R^(x) represents a hydrogenatom, an alkyl group, a cycloalkyl group, an alkoxy group, a cycloalkoxygroup, an aryl group or a monovalent heterocyclic group and these groupseach optionally have a substituent, and the plurality of R^(X) may bethe same or different and may be combined together to form a ringtogether with the carbon atoms to which they are attached, Ar representsan aromatic hydrocarbon group or a heterocyclic group and these groupseach optionally have a substituent, nA represents an integer of 0 to 3,L^(A) represents an alkylene group, a cycloalkylene group, an arylenegroup or a divalent heterocyclic group and these groups each optionallyhave a substituent, and when a plurality of L^(A) are present, they maybe the same or different, nB represents an integer of 0 to 3, L^(B)represents an alkylene group, a cycloalkylene group, an arylene group ora divalent heterocyclic group and these groups each optionally have asubstituent, and when a plurality of L^(A) are present, they may be thesame or different:

wherein M represents a ruthenium atom, a rhodium atom, a palladium atom,an iridium atom or a platinum atom, n¹ represents an integer of 1 ormore, n² represents an integer of 0 or more, and n¹+n² is 2 or 3, andn¹+n² is 3 when M is a ruthenium atom, a rhodium atom or an iridiumatom, while n¹+n² is 2 when M is a palladium atom or a platinum atom, E¹and E² each independently represent a carbon atom or a nitrogen atom,and at least one of E¹ and E² is a carbon atom, the ring R¹ represents a5-membered or 6-membered aromatic heterocyclic ring and these ringsoptionally have a substituent, and when a plurality of the substituentsare present, they may be the same or different and may be combinedtogether to form a ring together with the atoms to which they areattached, and when a plurality of the rings R¹ are present, they may bethe same or different, and E¹ is a carbon atom when the ring R¹ is a6-membered aromatic heterocyclic ring, the ring R² represents a5-membered or 6-membered aromatic hydrocarbon ring or a 5-membered or6-membered aromatic heterocyclic ring and these rings optionally have asubstituent, and when a plurality of the substituents are present, theymay be the same or different and may be combined together to form a ringtogether with the atoms to which they are attached, and when a pluralityof the rings R² are present, they may be the same or different, and E²is a carbon atom when the ring R² is a 6-membered aromatic heterocyclicring, and A¹-G¹-A² represents an anionic bidentate ligand, A¹ and A²each independently represent a carbon atom, an oxygen atom or a nitrogenatom and these atoms may be an atom constituting a ring, G¹ represents asingle bond or an atomic group constituting the bidentate ligandtogether with A¹ and A², and when a plurality of A¹-G¹-A² are present,they may be the same or different.
 8. The composition according to claim1, further comprising at least one material selected from the groupconsisting of a hole transporting material, a hole injection material,an electron transporting material, an electron injection material, alight emitting material, an antioxidant and a solvent.
 9. A compositioncomprising the polymer compound according to claim 7, and at least onematerial selected from the group consisting of a hole transportingmaterial, a hole injection material, an electron transporting material,an electron injection material, a light emitting material, anantioxidant and a solvent.
 10. A light emitting device produced by usingthe composition according claim
 1. 11. A light emitting device producedby using the polymer compound according to claim 7.